DV-OC3 Unit Reference Manual - WriteDocwritedoc.com/resume/projects/Nortel/documents/dv45/380.pdf · DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard FiberWorld Transmission

NT2H7908 323-1401-380

FiberWorld Transmission Product

Digital Video Codec DV-45

DV-OC3 Unit Reference Manual

FW02 3.01 Standard September 1995


Digital Video Codec DV-45 DV-OC3 Unit Reference Manual

DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard

1995 Northern TelecomAll rights reserved.

Integrated Community Networks is a trademark of Northern Telecom. DV-45 is a trademark of Northern Telecom.

Publication number: 323-1401-380Product release: FWP02 3.01Publication status: StandardPEC: NT2H7908Date: September 1995

ii

Publication historySeptember 1995

Standard issue for general release.

Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard

iii

ContentsPublication history ii

Introducing the DV-45 system 1–1DV-45 purpose 1–1DV-45 components 1–1

Cabinets 1–1DV-45 filler cards 1–2DV-45 shelves 1–2DV-45 Coders 1–2DV-45 Decoders 1–2DV-45 DCS units 1–2DV-45 MCUs 1–2DV-45 OC3 units 1–4

DV-OC3 unit description 2–1Feature description 2–2Functional description 2–3Interface description 2–4

Alarm indications 3–1Overview 3–1Alarm and status reporting 3–1Faceplate alarm indicators 3–2Alarm port indicators 3–5

Parallel alarm port 3–6Serial alarm port 3–6

Interpreting alarms and status indicators 3–9

DV-OC3 unit applications 4–1Bidirectional applications 4–1Unidirectional applications 4–2Single DS3 feed application 4–4Multiple DS3 feed application 4–5Data interface applications 4–6Hubbing to an OC12 application 4–7Hubbing from a DVN application 4–8

DV-OC3 Unit Reference Manual 323-1401-380 FW02 3.01 Standard

iv

Contents

Ordering information 5–1Typical configurations 5–2

Four DV-OC3 units in a DV-45 shelf 5–2One DV-OC3 unit within a DV-45 shelf 5–3

Provisioning DV-OC3 units 5–4

Technical specifications 6–1

Observing safety guidelines 7–1DV-45 shelf 7–1DV-45 units 7–1

Handling units 7–2Storing units 7–2Installing or replacing units 7–2

Optical fibers 7–3Laser radiation 7–3Bending optical fibers 7–3Handling optical fibers 7–3Splicing optical fibers 7–4Repairing optical fibers 7–4

Radio-frequency emissions 7–5

Installing and setting DV-OC3 unit options 8–1Requirements 8–1Chapter task list 8–2Procedure 8-1Installing a heat deflector and routing fiber cables 8–3Procedure 8-2Setting DV-OC3 unit options 8–7Procedure 8-3Installing DV-OC3 units in a DV-45 shelf 8–10Procedure 8-4Upgrading DV-45 MCU firmware 8–15Procedure 8-5Connecting DS3 signals to a DV-OC3 unit 8–17Procedure 8-6Cleaning and assembling optical connectors 8–19Procedure 8-7Measuring optical output power 8–24Procedure 8-8Measuring optical receive power 8–27

Digital Video Codec DV-45 323-1401-380 FW02 3.01 Standard

v

About this documentThis document provides DV-45 DV-OC3 unit descriptive, alarm, application, ordering, technical specification, and installation information.

AudienceThis document is intended for DV-45 equipment planners, provisioners, network administrators, installers, and maintenance personnel.

OrganizationThis document contains eight chapters:

Introducing the DV-45 system Gives an overview of the DV-45 system of which DV-OC3 units are part.

DV-OC3 unit description Describes the DV-OC3 unit purpose, features, functions, and interface connections.

Alarm indications Lists the DV-OC3 unit alarms, the conditions that initiate them, the TBOS mappings, and alarm interpretation.

DV-OC3 unit applications Describes applications of DV-OC3 units.

Ordering information Provides DV-OC3 unit provisioning and ordering information.

Technical specifications Summarizes the technical specifications of DV-OC3 units.

Observing safety guidelines Describes the precautions that should be observed when working with DV-45 shelves, DV-45 units, and optical fibers.

Installing and setting DV-OC3 unit options

Provides procedures for setting DV-OC3 unit options and installing DV-OC3 units.


vi

About this document


1-1

Introducing the DV-45 system 1-DV-OC3 units are part of the Northern Telecom (Nortel) DV-45 Digital Video Codec system. This chapter introduces the DV-45 system and describes how DV-OC3 units are used within it.

DV-45 purposeA DV-45 system converts analog video signals into digital signals for transmission on standard digital telecommunication equipment. A DV-45 system converts RS-170A National Television Systems Committee (NTSC) composite video signals to standard DS3 (44.736 Mb/s) digital signals. Typical applications of the DV-45 system are the Nortel Digital Video Network (DVN) and Video Operations Center (VOC) products.

DV-45 componentsThe main components of a DV-45 system are:

• cabinets

• filler cards

• DV-45 shelves

• DV-45 Coders

• DV-45 Decoders

• DV-45 DCS units

• DV-45 MCUs

• DV-45 DV-OC3 units

CabinetsFiber terminal inside plant (FTIP) cabinets and video codec enclosures (VCE) are used to house rack-mountable DV-45 shelves. Each FTIP cabinet has one 2.13 m (7 ft) by 584.20 mm (23 in.) wide equipment frame with a total of 44 mounting spaces (one mounting space equals 44.45 mm [1.75 in.]). Each VCE cabinet can house one DV-45 shelf, one power supply, and one interface panel. Both cabinets are designed to operate in 0°C to 40°C (32°F to 104°F) ambient temperatures.


1-2

Introducing the DV-45 system

DV-45 filler cardsIn order to meet electromagnetic interference (EMI) requirements, empty DV-45 shelf slots must be equipped with single or double filler cards.

DV-45 shelvesA DV-45 shelf is a light-weight steel card cage with a multilayer backplane. Modular plug-in units slide along card guides into connectors mounted in the backplane. The shelf has 11 plug-in positions which are keyed to prevent modules from being inserted in the wrong position. Adjustable mounting brackets allow installation into either a 482.6 mm (19 in.) or 584.2 mm (23 in.) mounting bay without additional hardware. See Figure 1-1.

DV-45 CodersA DV-45 Coder is a plug-in module that converts an analog NTSC video signal and up to four audio inputs to a DS3 digital output. A DV-45 Coder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video input and DS3 output signals and screw connections for audio input signals.

DV-45 DecodersA DV-45 Decoder is a plug-in module that converts a DS3 digital input into a video signal and up to four audio signals. A DV-45 Decoder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video output and DS3 input signals and screw connections for audio output signals.

DV-45 DCS unitsA DV-45 data communication synchronization (DCS) unit is a plug-in module that inserts or extracts low-speed data into or from the DS3 signal with the encoded video and audio signals. A DCS unit occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for DS3 signals and screw connections for data signals.

DV-45 MCUsA DV-45 maintenance control unit (MCU) is a plug-in module that communicates with the other modules in a DV-45 shelf and gathers alarms and status data and interprets them as major or minor alarm indicators. A MCU plugs into DV-45 shelf position 10. All connections are made at the rear of the DV-45 shelf—wire-wrap connections for major and minor alarms parallel interface; an E2A1 TBOS alarm serial interface (RS-422); and an E2A2 computer control data serial interface (RS-422).



1-3

Figure 1-1DV-45 shelf—front and rear views

FW-3101.1 & FW-2361

Decoder

CAUTION

Decoder

Position #

DecoderCoder MCUDCS

0 1 2 3 4 5 6 7 8 9 10

OC3

FW-2361Position # 7 6 5 4 3 2 1 0

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 4 CODEC 3 CODEC 2 CODEC 1

VIDEO & DS3 INPUT / OUTPUT FIELD

PORT 1

PORT 2

RS-232

BAT A

BAT B

DS1 FIELD FUSESRET BAT BAT RET

A B

POWER

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 2 CODEC 1

AUDIO INPUT / OUTPUT FIELD

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

DECODER/CODER CODER/DECODER DECODER/CODER

CODEC 4 CODEC 3

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

ALARMS

AUXILIARY

IN OUT

Video and DS3Input/Output Field

AlarmsAudio Input/Output Field


1-4


DV-45 OC3 unitsA DV-45 DV-OC3 unit is a plug-in module that multiplexes and demultiplexes three DS3 signals to one SONET OC3 (155 Mb/s) fiber signal. An DV-OC3 unit occupies two slot positions in a DV-45 shelf. DS3 signals are connected by BNC connectors located at the rear of the DV-45 shelf and OC3 fiber optic connections are made at the front of the unit.

Additional informationFor additional information on the DV-45 Digital Video Codec product, refer to the DV-45 Reference Manual, PEC NT2H7902.


2-1

DV-OC3 unit description 2-This chapter describes the DV-45 DV-OC3 unit purpose, features, functions, and interface connections.

A DV-OC3 unit is a plug-in module used to multiplex and demultiplex up to three DS3 signals to one SONET OC3 fiber signal. The unit occupies two slot positions in a DV-45 shelf (slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7). The three DS3 signals are connected by BNC connectors located at the rear of the DV-45 shelf. The OC3 fiber optic signals are connected to intermediate-reach or long-reach optical modules using ferrule (FC), straight (ST), or subscriber (SC) connectors located at the front of the DV-OC3 unit. The long-reach optical modules have a greater output power and greater input sensitivity.

The two types of optical module and three types of connector lead to six types of DV-OC3 unit. The six types of DV-OC3 unit, identified by their Nortel product engineering code (PEC), are:

PEC Description

NT2H08AB DV-OC3 unit, long reach, FC connector

NT2H08AC DV-OC3 unit, long reach, ST connector

NT2H08AD DV-OC3 unit, long reach, SC connector

NT2H08BB DV-OC3 unit, intermediate reach, FC connector

NT2H08BC DV-OC3 unit, intermediate reach, ST connector

NT2H08BD DV-OC3 unit, intermediate reach, SC connector


2-2

DV-OC3 unit description

Feature descriptionThe DV-OC3 unit:

• provides an unprotected fiber and DS3 interface

• fits in a DV-45 shelf and occupies two slot positions in a DV-45 shelf

• multiplexes three DS3 signals to one SONET OC3 signal

• demultiplexes one SONET OC3 signal to three DS3 signals

• can be used in bidirectional or unidirectional modes of operation

• can be equipped with intermediate and long reach optical units

• supports FC, ST, and SC type optical connectors

• interfaces to a SONET OC3 tributary on a SONET OC12 product

• interfaces to the DV-45 shelf backplane maintenance bus for alarms

• consists of two boards—one for control and one for the interface connectors

• does not support traffic protection by the K1, K2 bytes of the SONET line overhead layer; a fixed code is set at initialization

• does not support indicator byte H4

• sets, when required, bits 6–8 of the SONET line overhead byte K2 to indicate a line AIS (alarm indication signal) and far-end receive failure (FERF); when used in unidirectional mode, line FERF must be suppressed

• does not use the SONET data communication channels (DCC) of section overhead (bytes D1-D3) and line overhead (bytes D4-D12); when used with other equipment, the DCC alarm must be suppressed

• does not support performance monitoring

• does not support fault isolation, using SONET section overhead byte E1 (local orderwire) and line overhead byte E2 (express orderwire)

• does not use the SONET path overhead STS path trace byte (J1)

• does not support SONET OC-3C operation.



2-3

Functional descriptionSee Figure 2-1 for a functional block diagram of a DV-OC3 unit.

Figure 2-1Functional block diagram for a DV-OC3 unit

Block Description

DS3 Line Interface This module interfaces the DS3 signals from the BNC connectors on the back of the DV-45 shelf to the DS3/STS1 Mapper circuitry

VCO The voltage control oscillator (VCO) recovers the DS3 clock from the STS1 signal

DS3/STS1 Mapper This module provides the mapping between the DS3 and STS1 signals

STS1/STS3 Mux/DeMux and Synchronizer

This module synchronizes, multiplexes, and demultiplexes the STS1 and STS3 signals

Optical Module This module converts the STS3 electrical signal to an OC3 optical signal; it also provides interface circuitry for the input and output connectors on the front of the unit

CPU The central processing unit (CPU) controls all provisioning, alarm reporting, maintenance signaling, and data transfers between modules and the DV-45 backplane; the CPU is controlled by firmware stored in ROM and DIP switches on the unit

System Clock This module automatically provides the Tx Freerun clock signal when disconnected from the Rx fiber signal or when optioned to do so

PUPS The point-of-use power supply (PUPS) converts the DV-45 shelf -48 V dc supply to the voltages required by the unit

VCO

VCO

VCO

OC3

OpticalModule

CPUMaintenance Bus

Faceplate LEDs PUPs

DS3-1

DS3-2

DS3-3S

TS

1/S

TS

3 M

ux/D

eMux

and

Syn

chro

nize

r

SystemClock

o

DIPSwitches

o

DS3/STS1Mapper

DS3/STS1Mapper

DS3/STS1Mapper

DS3Line Interface

DS3Line Interface

DS3Line Interface

Out

In

In

In

In

Out

Out

Out

STS3

STS1-1

STS1-2

STS1-3


2-4


Interface descriptionThe DV-OC3 unit accepts: up to three DS3 input and three DS3 output connections; one OC3 input fiber connection; and one OC3 output fiber connection. The DS3 connections are made using BNC connectors at the rear of the DV-45 shelf (see Figure 2-2). The OC3 connections are made using fiber connectors on the front of the DV-OC3 unit (see Figure 2-3).

Figure 2-2Rear DS3 BNC connections

FW-2377.2

Note: A DS3 in and out ports label is provided with all DV-OC3 units.

DS3-1 OUT

DS3-2 OUT

DS3-3 OUT

DS3-1 IN

DS3-2 IN

DS3-3 IN

OC3 Line Interface

VIDEOOUT/IN

VIDEOOUT/LOOP

DS3IN/OUT

DS3MONITORDECODER/CODER

CODEC 2

Slot 5

DS3 inputs DS3 outputs

Slot 4 Slot 3



2-5

Figure 2-3Front OC3 fiber connections

FW-3103.1

Note: The OC3 input and output fibers are routed through a DV-45 fiber management heat deflector mounted on top of the DV-45 shelf. The fiber management integrated into the heat deflector provides for storing additional fiber for up to 16 cables and four miniature variable optical attentuators (mVOA). Transmission fiber access is provided at the left-hand side of the heat deflector. Access to DV-OC3 units is provided through the bottom of the heat deflector.

Locking Bar

01

2

67

89

10

CAUTION


2-6



3-1

Alarm indications 3-This chapter lists the DV-OC3 unit alarms, the conditions that initiate them, the telemetry byte-oriented serial (TBOS) mappings, and alarm interpretation.

OverviewThe central processing unit (CPU) of a DV-OC3 unit detects and diagnoses alarms. The CPU routes alarms to the unit’s faceplate and the internal maintenance bus (M-bus) on the DV-45 shelf backplane. A DV-45 maintenance control unit (MCU) collects alarms from the M-bus, classifies them as major or minor alarms, and routes them to parallel and serial (TBOS) alarm ports at the rear of the DV-45 shelf.

Various conventions are used to define signal transmit (Tx) and receive (Rx) directions; the convention used within this chapter is illustrated in Figure 3-1.

Figure 3-1Signal convention

Alarm and status reportingA DV-OC3 card has two modes of operation—bidirectional or unidirectional. These modes determine alarm and status reporting. The OC3 line and STS-DS3 transmit (Tx) and receive (Rx) interfaces may be equipped or unequipped. The DS3 line build out (LBO) may be set to IN or OUT using switches or TBOS commands. The system clock may be set to Loop timed or Freerun mode.

Rx Tx

RxTx

OC3 signalsDS3 signals

Rx = receiveTx = transmit

DV-OC3 unit


3-2

Alarm indications

Some TBOS control points function as both status indicators and command points. When used as a command point, the operator can operate a momentary latch from TBOS and override the switch settings. The state of the OC3 line, STS path, DS3 interface, LBO, and system clock are set by switch settings on the DV-OC3 unit (see “Setting DV-OC3 unit options” on page 8-7) and may be overwritten by TBOS command points set by the MCU. STS path unequipped and DS3 alarm indication signal (AIS) are automatically inserted by the software on unequipped channels. Hardware status is reported using alarm points and may be accessed through the MCU E2A1, RS-422, serial alarm port using a TBOS digital alarm scanner.

Most hardware faults are detected by self-checking circuitry. Alarm and status information is reported by the software as equipment or facility alarms. The CPU is reset whenever a software failure is detected. Remote alarm and status reporting is not supported, so all alarm and status information is only reported locally. Alarms on channels provisioned as unequipped are not reported.

Note: For TBOS 1.0, the “DS3-x Fac. Lpb” control points function as both status indication and command points. For TBOS 2.0, the “STS-x Tx Eqp.”, “STS-x Rx Eqp.”, “DS3-x Fac. Lpd Rq”, “DS3-x LBO”, and “Loop Time” all function as both status indication and command points.

Faceplate alarm indicatorsEquipment and facility alarms are indicated using colored light-emitting diodes (LED) on the faceplate. Refer to Table 3-1 for each alarm indication and its associated LED. Refer to Figure 3-2 for the location of each LED on the faceplate. To eliminate related alarm indications; lower-level alarms are masked when associated higher-level alarms are generated (see Figure 3-3).

Table 3-1DV-OC3 unit faceplate LED alarm indicators

LED Alarm Indication

OC3 (Yellow) This LED indicates one or more OC3 facility alarms: LOS (loss of signal); LOF (loss of frame); Line AIS (alarm indication signal); Line FERF (far-end receive fault); Line degrade (B2 BIP-8); Section degrade (B1 BIP-8); Signal degrade

STS/DS3-1 (Yellow) These LEDs indicate one or more of the following STS1 path or DS3 facility alarms (alarms on unequipped channels are not reported): STS AIS (alarm indication signal) path detect; STS yellow detect; STS path degrade; STS Rx path unequipped; STS signal label mismatch; DS3 Tx loss of signal; Tx BCV (bipolar code violation); DS3 Tx/Rx frame loss; DS3 Tx/Rx AIS (alarm indication signal); DS3 Tx/Rx degrade

STS/DS3-2 (Yellow)

STS/DS3-3 (Yellow)

ON (Green) This LED indicates that the unit is active and functioning correctly

FAIL (Red) This LED indicates one or more of the following equipment failure alarms: battery A and B; power; mapper (R96); TOP; Muldem; clock module; PAL chip; optics


Alarm indications

3-3

Figure 3-2DV-OC3 unit faceplate LED locations

FW-3100.1

ALARM STATUS

STS-DS3-1

UNITON

FAIL

OC3

STS-DS3-2

STS-DS3-3

In Out

CAUTIONAvoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.

OC3 facility alarm LED (Yellow)LOS; LOF; Line AIS and FERF; Line, Section, and Signal degrade

STS-DS3 facility alarm LEDs (Yellow)STS: path AIS detect; yellow detect; path degrade; SPE Rx path unequipped; signal label mismatchDS3: Tx loss of signal; Tx bipolar code violation; Tx/Rx frame loss; Tx/Rx AIS; Tx/Rx degrade

ON LED (Green)Unit is active and functioning properly

FAIL LED (Red)Unit equipment failure: battery A or B; power; mapper; TOP; Muldem; clock module; parity; optics


3-4 Alarm indications

Figure 3-3Alarm hierarchy (higher-level alarms mask lower-level alarms)

Optical Line

OC3 Facility

DS3 Facility

Rx LOS

Rx LOF

Rx Line AIS

Rx Line FERF Rx Degrade

STS Rx Yellow

STS Rx Path AIS

STS Rx Path Unequipped

STS Rx

STS Rx

mismatch

DS3 Tx LOF

DS3 Tx AIS

STS-1

DS3

DS3 Rx LOS

DS3 Rx LOF

DS3

DS3 Rx AIS

DS3 Rx Degrade

DS3 Rx BPV

Signal label

Path Degrade

DS3 Tx Degrade


Alarm indications 3-5

Alarm port indicatorsAll equipment and facility alarms routed to the maintenance bus (M-bus) on the DV-45 shelf backplane are gathered by the MCU, classified as major or minor, and routed to parallel (relay closure) and serial (E2A TBOS) alarm ports at the rear of the DV-45 shelf (refer to Figure 3-4). Visual and audible indicators can be connected to the parallel, relay contact, port. A TBOS digital alarm scanner can be connected to the serial E2A1 RS-422 port. To determine alarm causes, see “Interpreting alarms and status indicators” on page 3-9.

Note: Orderwire capability is not supported.

Figure 3-4DV-45 shelf alarm port connections

FW-0301.1

ALARMS

MON1MON2NOC

NCNO

CNCEXT ACO

BAT RETNOC

NCNO

CNC

MAJVISMAJAUD

MINVISMINAUD

T+T-R+R-T+T-R+R-

12345678

E2A1E2A2

OW

JACK



Parallel alarm port The parallel port provides normally open (NO) and normally closed (NC) relay connections for major and minor visual (for example, lamp) and audible (for example, buzzer) indicators. All major and minor alarm indicators are activated upon power failure. An external alarm cutoff (ACO) connection is provided so that audible alarm indicators can be silenced (see Figure 3-4).

Serial alarm port The serial alarm port is an industry standard E2A, RS-422, port (see Figure 3-4) which can represent up to 512 alarm points (each point is represented by one bit). The alarm points can be accessed through the port eight bits at a time by a TBOS digital alarm scanner. This section assumes you are familiar with TBOS; for a full description, see Alarms and Surveillance, 323-1401-102, within the DV-45 Reference Manual, PEC NT2H7902.

Alarm points are used to represent the same alarms as those routed to the LED faceplate indicators on the DV-OC3 unit. All alarm points are mapped to bits and bytes according to the DV-45 shelf position of the DV-OC3 unit. A DV-45 MCU can be optioned for TBOS 1.0 or TBOS 2.0 E2A mappings and display addresses (see Figure 8-10 on page 8-16). For TBOS 1.0 mappings, refer to Table 3-2. For TBOS 2.0 mappings, refer to Table 3-3, Table 3-4, Table 3-5, and Table 3-6; for TBOS 2.0, each DV-OC3 unit occupies an entire display.

Table 3-2TBOS 1.0 displays 0, 2, 4, 6 (MCU E2A addresses 00, 01, 10, 11—local only)

Bit 1 2 3 4 5 6 7 Bit 8Byte

0Shelf Minor Shelf

Major

DV-OC3 unit in shelf slots 0 and 1Byte

1OC3 Fac. Err.

STS1/DS3-3 Fac. Err.



Unit Fail

5 DS3-3 Fac. Lpb

DS3-2 Fac. Lpb

DS3-1 Fac. Lpb


2OC3 Fac. Err.




Unit Fail

5 DS3-3 Fac. Lpb

DS3-2 Fac. Lpb

DS3-1 Fac. Lpb


3OC3 Fac. Err.




Unit Fail

6 DS3-3 Fac. Lpb

DS3-2 Fac. Lpb

DS3-1 Fac. Lpb


4OC3 Fac. Err.




Unit Fail

6 DS3-3 Fac. Lpb

DS3-2 Fac. Lpb

DS3-1 Fac. Lpb



Table 3-3TBOS 2.0 displays 0, 4 (MCU E2A addresses 00, 01) for an OC3 unit in slots 0 & 1

Bit 1 2 3 4 5 6 7 Bit 8

Byte 0

OC3 Optical Degr.

OC3 Sect. Degr.

OC3 Line Degr.

Shelf Minor

OC3 Line AIS

OC3LOF

OC3 LOS

Shelf Major

1 OC3Line FERF

STS-3 Rx Eqp.

STS-3 Tx Eqp.

STS-2 Rx Eqp.

STS-2 Tx Eqp.

STS-1 Rx Eqp.

STS-1 Tx Eqp.

Unit Fail

2 STS-2 Path SigMis

STS-2 Path Uneqp

STS-2 Path AIS

STS-1 Path SigMis

STS-1 Path Uneqp

STS-1 Path AIS

3 STS-2 Path Degr.

DS3-2 Tx Degr.

DS3-2 Tx AIS

DS3-2 Tx LOF

STS-1 Path Degr.

DS3-1 Tx Degr.

DS3-1 Tx AIS

DS3-1 Tx LOF

4 DS3-2 Rx Degr.

DS3-2 Rx AIS

DS3-2 Rx Fail

STS-2 Path Yel.

DS3-1 Rx Degr.

DS3-1 Rx AIS

DS3-1 Rx Fail

STS-1 Path Yel.

3 DS3-2 LBO

DS3-1 LBO

DS3-1 Fac. Lpd Rq

STS-3 Path SigMis

STS-3 Path Uneqp

STS-3 Path AIS

6 Loop Timed

DS3-3 LBO

DS3-2 Fac. Lpd Rq

STS-3 Path Degr.

DS3-3 Tx Degr.

DS3-3 Tx AIS

DS3-3 Tx LOF

7 Config. Fail

DS3-3 Fac. Lpd Rq

DS3-3 Rx Degr.

DS3-3 Rx AIS

DS3-3 Rx Fail

STS-3 Path Yel.


Bit 1 2 3 4 5 6 7 Bit 8

Byte 0

OC3 Optical Degr.

OC3 Sect. Degr.

OC3 Line Degr.

Com. Chan. Fail

OC3 Line AIS

OC3LOF

OC3 LOS

Remote Alarm

1 OC3Line FERF

STS-3 Rx Eqp.

STS-3 Tx Eqp.

STS-2 Rx Eqp.

STS-2 Tx Eqp.

STS-1 Rx Eqp.

STS-1 Tx Eqp.

Unit Fail

2 STS-2 Path SigMis

STS-2 Path Uneqp

STS-2 Path AIS

STS-1 Path SigMis

STS-1 Path Uneqp

STS-1 Path AIS

3 STS-2 Path Degr.

DS3-2 Tx Degr.

DS3-2 Tx AIS

DS3-2 Tx LOF

STS-1 Path Degr.

DS3-1 Tx Degr.

DS3-1 Tx AIS

DS3-1 Tx LOF

4 DS3-2 Rx Degr.

DS3-2 Rx AIS

DS3-2 Rx Fail

STS-2 Path Yel.

DS3-1 Rx Degr.

DS3-1 Rx AIS

DS3-1 Rx Fail

STS-1 Path Yel.

3 DS3-2 LBO

DS3-1 LBO

DS3-1 Fac. Lpd Rq

STS-3 Path SigMis

STS-3 Path Uneqp

STS-3 Path AIS

6 Loop Timed

DS3-3 LBO

DS3-2 Fac. Lpd Rq

STS-3 Path Degr.

DS3-3 Tx Degr.

DS3-3 Tx AIS

DS3-3 Tx LOF

7 Config. Fail

DS3-3 Fac. Lpd Rq

DS3-3 Rx Degr.

DS3-3 Rx AIS

DS3-3 Rx Fail

STS-3 Path Yel.




Bit 1 2 3 4 5 6 7 Bit 8

Byte 0

OC3 Optical Degr.

OC3 Sect. Degr.

OC3 Line Degr.

Power Fail

OC3 Line AIS

OC3LOF

OC3 LOS

Batt. Fail

1 OC3Line FERF

STS-3 Rx Eqp.

STS-3 Tx Eqp.

STS-2 Rx Eqp.

STS-2 Tx Eqp.

STS-1 Rx Eqp.

STS-1 Tx Eqp.

Unit Fail

2 STS-2 Path SigMis

STS-2 Path Uneqp

STS-2 Path AIS

STS-1 Path SigMis

STS-1 Path Uneqp

STS-1 Path AIS

3 STS-2 Path Degr.

DS3-2 Tx Degr.

DS3-2 Tx AIS

DS3-2 Tx LOF

STS-1 Path Degr.

DS3-1 Tx Degr.

DS3-1 Tx AIS

DS3-1 Tx LOF

4 DS3-2 Rx Degr.

DS3-2 Rx AIS

DS3-2 Rx Fail

STS-2 Path Yel.

DS3-1 Rx Degr.

DS3-1 Rx AIS

DS3-1 Rx Fail

STS-1 Path Yel.

3 DS3-2 LBO

DS3-1 LBO

DS3-1 Fac. Lpd Rq

STS-3 Path SigMis

STS-3 Path Uneqp

STS-3 Path AIS

6 Loop Timed

DS3-3 LBO

DS3-2 Fac. Lpd Rq

STS-3 Path Degr.

DS3-3 Tx Degr.

DS3-3 Tx AIS

DS3-3 Tx LOF

7 Config. Fail

DS3-3 Fac. Lpd Rq

DS3-3 Rx Degr.

DS3-3 Rx AIS

DS3-3 Rx Fail

STS-3 Path Yel.


Bit 1 2 3 4 5 6 7 Bit 8

Byte 0

OC3 Optical Degr.

OC3 Sect. Degr.

OC3 Line Degr.

OC3 Line AIS

OC3LOF

OC3 LOS

1 OC3 Line FERF

STS-3 Rx Eqp.

STS-3 Tx Eqp.

STS-2 Rx Eqp.

STS-2 Tx Eqp.

STS-1 Rx Eqp.

STS-1 Tx Eqp.

Unit Fail

2 STS-2 Path SigMis

STS-2 Path Uneqp

STS-2 Path AIS

STS-1 Path SigMis

STS-1 Path Uneqp

STS-1 Path AIS

3 STS-2 Path Degr.

DS3-2 Tx Degr.

DS3-2 Tx AIS

DS3-2 Tx LOF

STS-1 Path Degr.

DS3-1 Tx Degr.

DS3-1 Tx AIS

DS3-1 Tx LOF

4 DS3-2 Rx Degr.

DS3-2 Rx AIS

DS3-2 Rx Fail

STS-2 Path Yel.

DS3-1 Rx Degr.

DS3-1 Rx AIS

DS3-1 Rx Fail

STS-1 Path Yel.

3 DS3-2 LBO

DS3-1 LBO

DS3-1 Fac. Lpd Rq

STS-3 Path SigMis

STS-3 Path Uneqp

STS-3 Path AIS

6 Loop Timed

DS3-3 LBO

DS3-2 Fac. Lpd Rq

STS-3 Path Degr.

DS3-3 Tx Degr.

DS3-3 Tx AIS

DS3-3 Tx LOF

7 DS3-3 Fac. Lpd Rq

DS3-3 Rx Degr.

DS3-3 Rx AIS

DS3-3 Rx Fail

STS-3 Path Yel.



Interpreting alarms and status indicatorsAll alarms are classified as minor or major; the possible alarm and status conditions are listed in Table 3-7 and Table 3-8 to help you determine the cause of the alarm.

Table 3-7Minor alarm and status indications

LED Possible Alarm Point and Signal Description

OC3 (Yellow) • OC3 Line Degrade: the received OC3 optical signal has a line BER (bit error rate) higher than 10 -6

• OC3 Section Degrade: the received OC3 optical signal has a section BER (bit error rate) higher than 10 -6

• OC3 Optical Degrade: the received OC3 optical signal is attentuated without traffic degradation

Note: In TBOS 1.0, all OC3 facility alarms are represented with the OC3 Facility Error E2A alarm point

STS/DS3-1 (Yellow)STS/DS3-2 (Yellow)STS/DS3-3 (Yellow)

• STS Rx Path Unequipped: generated when the STS Tx DS3 facility has been deactivated at another shelf; or a DS3 blue signal has been detected from another shelf

• STS Rx Path Signal Degrade: the STS1 has a BER (bit error rate) higher than 10-6

• DS3 Rx Degrade: a DS3 signal with a BER (bit error rate) higher than 10-6 has been detected on a DS3 input

• DS3 Tx Degrade: a DS3 signal with a BER (bit error rate) higher than 10-6 has been detected on a DS3 output

Note: In TBOS 1.0, all STS1 and DS3 facility alarms are represented by a STS1/DS3-# Facility Error E2A alarm point

Table 3-8 Major alarm and status indications

Alarm LED Possible Alarm Point and Signal Description

OC3 (Yellow) • OC3 LOS (loss of signal): the optical fiber is disconnected; or a Line FERF has been detected from another shelf

• OC3 LOF (loss of frame): the SONET frame is corrupted without optical signal degradation; or a Line FERF has been detected from another shelf

• OC3 Line AIS (alarm indication signal): generated when received from another shelf; or a Line FERF has been detected from another shelf

• OC3 Line FERF (far-end receive failure): an OC3 LOS, OC3 LOF, or OC3 Line AIS has been detected from another shelf

Note: In TBOS 1.0, all OC3 facility alarms are represented with the OC3 Facility Error E2A alarm point

—continued—



STS/DS3-1 (Yellow)STS/DS3-2 (Yellow)STS/DS3-3 (Yellow)

• STS Rx Path AIS (alarm indication signal): an AIS has been inserted in the SONET overhead and STS Rx Yellow has been sent to another shelf

• STS Path Signal Label Mismatch: the C2 byte has not been set to the allowed C2 bytes (00=unequipped, 01=equipped-non specific payload, 04=asynchronous mapping for DS3)

• STS Rx Yellow: an STS Rx Path AIS alarm exists at another shelf

• DS3 Rx Fail: a DS3 Rx LOS, BPV, or LOF failure has occurred and DS3 Tx AIS has been sent to another shelf to indicate a DS3 LOS or DS3 Tx LOF failure; a DS3 Rx Degrade minor alarm indicates a DS3 BPV failure at another shelf

• DS3 Rx AIS: a DS3 blue signal has been fed into a DS3 input

• DS3 Tx LOF (loss of frame): the payload of an unframed DS3 has been received

• DS3 Tx AIS (alarm indication signal): a DS3 blue signal has been sent out a DS3 output

Note: In TBOS 1.0, all STS1 and DS3 facility alarms are represented by the STS/DS3-# Facility Error E2A alarm point

FAIL (Red) • Battery Fail: battery A or B has failed or backplane fuse A or B is defective

• Unit Fail: hardware failure

• Configuration Fail: an DV-OC3 unit has been inserted in a slot position other than 0, 2, 4, or 6

• Communication Channel Fail: the communication channel between the DV-OC3 unit and the MCU is corrupted

Note: All equipment failure alarms are represented by the Unit Fail E2A alarm point. The Communication Channel Fail E2A alarm point is reported in TBOS 2.0 Displays 1 and 5 and is the result of a Communication Fail alarm from any DV-45 unit

—end—

Table 3-8 (continued)Major alarm and status indications

Alarm LED Possible Alarm Point and Signal Description


4-1

DV-OC3 unit applications 4-DV-OC3 units can be used in bidirectional and unidirectional modes of operation. This chapter describes the use of DV-OC3 units in typical bidirectional and unidirectional applications and five specific applications:

• bidirectional applications

• unidirectional applications

• single DS3 feed application

• multiple DS3 feed application

• data interface application

• hubbing to an OC12 application

• hubbing from a DVN application

Bidirectional applicationsTypical bidirectional applications include:

• point-to-point between DV-OC3 units (see Figure 4-1)

• point-to-point between a DV-OC3 unit and a SONET OC3 TBM shelf (see Figure 4-2)

• DV-OC3 unit interfacing as a tributary to a SONET OC12 TBM transport shelf (see Figure 4-3).

In each application, the default DV-OC3 unit switch 1 and switch 2 options (all set to 1) would be used.

Figure 4-1Point-to-point between DV-OC3 units

DV-OC3 DV-OC3

DS3DS3

o

o


4-2 DV-OC3 unit applications

Figure 4-2Point-to-point between a DV-OC3 unit and an OC3 TBM shelf

Figure 4-3DV-OC3 unit interfacing as a tributary to an OC12 TBM transport shelf

Unidirectional applicationsUnidirectional DV-OC3 unit applications may take two forms. In the first form, only DS3 signals are transmitted from a site (see site A in Figure 4-4). In the second form, DS3 signals are received and then the same or a different DS3 signal is reinserted (see site B in Figure 4-4) for transmission to the next site (see site C in Figure 4-4). In the second form, the DV-OC3 unit acts as an Add/Drop multiplexer.

Figure 4-4Unidirectional applications

DV-OC3 OC3 TBM

DS3DS3

o

o

DV-OC3 OC3

DS3

o

oOC12

o

o

OC12 TBM Shelf

DV-OC3

DS3

DS3

o o

DV-OC3

OC3, OC12, or DV-OC3

site A site B site C


DV-OC3 unit applications 4-3

DV-OC3 unit switch 1 and switch 2 settings for each site shown in Figure 4-4 are shown in Table 4-1. Also see “Setting DV-OC3 unit options” on page 8-7.

Note 1: Setting DV-OC3 unit Sw2-8 to “Unidirectional” masks the line FERF signal being transmitted on a Rx line failure and prevents the echo of the K bytes. If a DV-OC3 unit is NOT being used, the Line FERF alarm must be turned OFF on the OC3 or OC12 product.

Note 2: DV-OC3 units do not support SONET DCC; therefore, the SONET DCC link fail alarm will always be ON. The alarm must be turned OFF on the OC3 and OC12 product.

Note 3: When a DV-OC3 unit STS channels are set as “Unequipped”, a STS Rx Unequipped alarm will be generated. The alarm must be turned OFF on the OC3 and OC12 product.

Note 4: See Provisioning and Operations Procedures, 323-1111-310, for alarm provisioning on Nortel OC3 and OC12 TBM shelf products.

Table 4-1Unidirectional DV-OC3 unit switch settings

Switch Label Site A Site B Site C

Sw1-1 STS Tx1 Equipped Equipped Unequipped

Sw1-2 STS Rx1 Unequipped Equipped Equipped





Sw1-7 OC3 Rx Unequipped Equipped Equipped

Sw1-8 Loop Freerun Loop Timed Loop Timed

Sw2-1 LBO1 On (=1) On (=1) On (=1)

Sw2-2 LBO2 On (=1) On (=1) On (=1)

Sw2-3 LBO3 On (=1) On (=1) On (=1)

Sw2-4 unused

Sw2-5 STS-1 Unidirectional Unidirectional Unidirectional



Sw2-8 OC3 Unidirectional Unidirectional Unidirectional



Single DS3 feed applicationNortel’s Digital Video Network (DVN) room sites use a Video Codec Enclosure (VCE) that houses a DV-45 shelf equipped with units for processing and transmitting video, audio, and control data between DVN rooms. Figure 4-5 shows the equipment required for a single DS3 signal fed into one DVN room. One bidirectional DS3 signal from the DV-OC3 unit is connected to the DCS card; the other two DV-OC3 DS3 channels would be optioned as unequipped. Input and output connections to the fiber network are made from the front of the DV-OC3 unit.

Figure 4-5DV-OC3 unit used with a single DS3 signal

Coder

DCS

DV-OC3

o

o

Tx

Rx

DecoderDS3-1

DS3-2

DS3-3

Unu

sed

Audio & video

Audio & video

X.25 2xT1

Control



Multiple DS3 feed applicationFigure 4-6 illustrates the equipment required to handle three DS3 signals fed into one DVN room. One bidirectional DS3 signal from the DV-OC3 unit is connected to a DV-45 DCS card; the other two DV-OC3 DS3 channels would be optioned as unidirectional. Input and output connections to the fiber network are made from the front of the DV-OC3 unit.

Figure 4-6DV-OC3 unit used with multiple DS3 signals

DV-45Coder

DCS

DV-45Decoder

DV-45Decoder

DV-45Decoder

Control

RoomMonitor

Audio

Audio

Audio

Audio

RoomMonitor

RoomMonitor

X.252x T1

MCU Tx

RxDV

-OC

3

VCR

Laser

Other

Disk

Roo

m V

ideo

Sw

itch

DV-45 shelf

DS3-1

DS3-2

DS3-3



Data interface applicationsFigure 4-7 illustrates the equipment required to handle two bidirectional DS3 signals. One bidirectional DS3 signal from the DV-OC3 unit is connected to a DV-45 DCS card; the second bidirectional DS3 signal is connected to an external SMDS or Frame Relay data interface; the third DS3 channel would be optioned as unequipped.

Figure 4-7Handling a single data interface

Figure 4-8 illustrates the equipment required to handle three bidirectional DS3 signals. Each bidirectional DS3 signal from the DV-OC3 unit is connected to a DCS card; each DCS card is connected to four DS1 data signals. A fully utilized DV-OC3 unit can handle 12 DS1 data signals. In this application, the DV-OC3 unit would use the default factory-set options.

Figure 4-8Handling multiple data interfaces

Control

DCS

DV-OC3

Data I/F

Coder

Decoder

DS3-1

DS3-2

DS3-3

/2

DS-1

SDMS,

Frame Relay

Audio & video

Audio & video Tx

Rx

DCS

DCS

DCS

DV-OC3

Tx

Rx

DS3-1

DS3-2

DS3-3

4 DS1

/

4 DS1

/

4 DS1

/



Hubbing to an OC12 applicationFigure 4-9 shows a DV-45 system handling 12 bidirectional DS3 signals. Each bidirectional DS3 signal is connected to an DV-OC3 unit DS3 input and output; the DV-OC3 unit OC3 optical inputs and outputs are connected to the OC3 optical tributary input and output connections on the OC12 terminal. A fully equipped DV-45 shelf can handle four DV-OC3 units and 12 bidirectional DS3 signals. In this application, each DV-OC3 unit would use the default factory-set options.

Figure 4-9Connecting 12 DS3 signals to an OC12 unit

DV-OC3

DV-OC3

DV-OC3

SO

NE

T O

C-1

2 T

erm

inal

3 DS3

/

3 DS3

/

3 DS3

/

DV-OC33 DS3

/

DV-45 shelf



Hubbing from a DVN applicationFigure 4-10 shows the equipment for handling 12 DS3 signals in a Digital Video Network (DVN) application. The DV-OC3 unit is equipped in a DV-45 shelf within a VCE located at each room site. Each OC3 optical signal, containing the room audio and video signals encoded as a DS3 signal, is sent to the local service providers’s equipment office where it is hubbed to a DV-45 shelf. At this point, the service provider has access to the DS3 signals from the rooms to either connect to a DS3 routing switch or input to a backbone fiber optic transmission system (FOTS). In this application, each DV-OC3 unit at the service provider equipment office, would use the default factory-set options.

Figure 4-10DVN hubbing application

Dec

oder

Cod

er

DC

S

Dec

oder

DV

-OC

3

Dec

oder

Bla

nk

Bla

nk

MC

U

VCE

Room A

MCU

Blank

DV-OC3

DV-OC3

DV-OC3

DV-OC3

3 DS3s

To / from DS3

Routing Switch

or

Backbone FOTS

3 DS3s

3 DS3s

3 DS3s

OC3

OC3

OC3

OC3

Service ProviderEquipment Office

Dec

oder

Cod

er

DC

S

Dec

oder

DV

-OC

3

Dec

oder

Bla

nk

Bla

nk

MC

U

VCE

Room B

Dec

oder

Cod

er

DC

S

Dec

oder

DV

-OC

3

Dec

oder

Bla

nk

Bla

nk

MC

U

VCE

Room C

Dec

oder

Cod

er

DC

S

Dec

oder

DV

-OC

3

Dec

oder

Bla

nk

Bla

nk

MC

U

VCE

Room D


5-1

Ordering information 5-This chapter provides the information required for provisioning and ordering DV-45 DV-OC3 units. Ordering information for equipment directly related to DV-OC3 unit provisioning is included. For other DV-45 equipping rules refer to Ordering Information, 323-1401-151, within the DV-45 Reference Manual, PEC NT2H7902.

DV-OC3 units can be used in a number of different applications. To assist you in provisioning DV-OC3 units, two typical configurations are described.


5-2 Ordering information

Typical configurationsTwo typical configurations are described: four DV-OC3 units in a DV-45 shelf; and one DV-OC3 unit within a DV-45 shelf.

Four DV-OC3 units in a DV-45 shelfTypically, this configuration would be used in a DV-45 shelf within a 7-ft. mounting bay, at a Digital Video Network (DVN) cell switching site. The DV-OC3 units provide an optical interface to an optical fiber transmission network used to interconnect DVN sites. See Figure 5-1.

Figure 5-1DV-45 shelf fully equipped with DV-OC3 units

FW-3102

Note: A fully-equipped DV-45 shelf configuration could also be used with low-cost hubbing applications; for example, feeding 12 DS3 signals to an OC12 system that accepts four OC3 inputs and outputs one OC12 signal.

FW 3102

Position #

MCU

CAUTION CAUTION CAUTIONCAUTION

0 1 2 3 4 5 6 7 8 9 10

OC3OC3OC3 OC3


Ordering information 5-3

One DV-OC3 unit within a DV-45 shelfTypically, this configuration would be used in a DV-45 shelf within a Video Codec Enclosure (VCE) at a DVN room site. This configuration provides for three DS3 feeds into the same room. The DV-OC3 unit provides an optical interface to an optical fiber transmission network used to connect to a DVN cell switching site. See Figure 5-2.

Figure 5-2DV-45 shelf equipped with one DV-OC3 unit

FW-3101.1

Note: A DV-OC3 unit can be optioned to handle a single bidirectional DS3 signal by setting unused STS-1 channels to unequipped.

Decoder

CAUTION

Decoder

Position #

DecoderCoder MCUDCS

0 1 2 3 4 5 6 7 8 9 10

OC3



Provisioning DV-OC3 unitsMajor equipment produced by Nortel is identified with a product engineering code (PEC). Use the circuit pack code (CPC) to order equipment from Nortel. The Bellcore common language equipment identifier (CLEI) is also used to identify equipment.

Note: DV-OC3 units can be used in an existing DV-45 shelf if the existing DV-45 MCU is upgraded to NT2H35LA vintage. For NT2H35CA/EA MCUs, the upgrade can be made by replacing the EPROMs.

Table 5-1 DV-OC3 unit equipping guidelines

DV-OC3 Equipping

Rule #

Rule Description Ordering Codes

PEC CPC CLEI

1 Order IR FC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)

NT2H08BB A0615639 voiuca01aa

2 Order IR ST connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)

NT2H08BC A0615640 voiuba01aa

3 Order IR SC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)

NT2H08BD A0615641 voiuaa01aa

4 Order LR FC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)

NT2H08AB A0615636 voiufa01aa

5 Order LR ST connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)

NT2H08AC A0615637 voiuea01aa

6 Order LR SC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)

NT2H08AD A0615638 voiuda01aa

—continued—



7 Order one DV-OC3 unit of each type used in the system as a spare

8 Order one MCU EPROM upgrade kit for existing DV-45 MCUs (NT2H35EA or earlier) that have to handle DV-OC3 units

NT2H99LA A0635821

9 Order one DV-45 MCU for each new DV-45 shelf equipped with DV-OC3 units

NT2H35LA A0618350 votrwcx3aa

10 Order one DV-45 shelf to house up to 4 DV-OC3 units. A DV-45 shelf can be mounted in 483.0 mm (19 in.) or 584.0 mm (23 in.) bays, adjustable mounting brackets are provided with the shelf. A maximum of four DV-45 shelves can be mounted in a 7-ft. bay

NT2H50AC A0349030

11 Order a heat deflector with fiber management for each new and existing DV-45 shelf equipped with DV- OC3 units (to be mounted above each DV-45 shelf)

NT2H51AC A0617282 vomyacnzaa

12 Order double blank information cards as required to fill empty DV-45 shelf positions (required for proper EMI shielding)

NT2H39AA A0349016 vopq2701aa

13 Order one DV-45 Reference Manual for each location that uses DV-OC3 units

NT2H79AA A0350651

14 Order additional DV-45 DV-OC3 Unit Reference Manual, 240-1401-380, as required

NT2H7908 A0635597

15 Order 6 BNC right-angle adapters for use with each DV-OC3 unit

CX01APJ75RT A0361070

16 Order VCE cabinet equipped with knockout panel, DV-45 shelf, power supply, and 10 ft. ac-power cord

NT2H57AA A0626349

17 Order 60 in. cabinet equipped with power supply, FMT-150B, DV-45 shelf, DSX3 X-connect panel, and fuse and alarm panel. 120V 240V

NT7N60ABNT7N60AC

A0623736A0623737

18 Order fiber and DS3 cable as required(see Table 5-2)

see Table 5-2 see Table 5-2

—end—

Table 5-1 (continued)DV-OC3 unit equipping guidelines

DV-OC3 Equipping

Rule #

Rule Description Ordering Codes

PEC CPC CLEI



Table 5-2 Fiber and DS3 cable ordering codes

Cable description PEC CPC

Fiber cables

SM Optical Patchcord (FC-FC) 5 m (16 ft) NT7E46BA A0365303

SM Optical Patchcord (FC-FC) 10 m (33 ft) NT7E46BB A0365304

SM Optical Patchcord (FC-FC) 15 m (49 ft) NT7E46BC A0365305

SM Optical Patchcord (FC-FC) 20 m (66 ft) NT7E46BD A0365306

SM Optical Patchcord (FC-FC) 30 m (98 ft) NT7E46BE A0388572

SM Optical Patchcord (ST-ST) 5 m (16 ft) NT7E46CA A0351099

SM Optical Patchcord (ST-ST) 10 m (33 ft) NT7E46CB A0351100

SM Optical Patchcord (ST-ST) 15 m (49 ft) NT7E46CC A0351101

SM Optical Patchcord (ST-ST) 20 m (66 ft) NT7E46CD A0351102

SM Optical Patchcord (ST-ST) 30 m (98 ft) NT7E46CE A0388573

SM Optical Patchcord (SC-SC) 5 m (16 ft) NT7E46FA A0408374

SM Optical Patchcord (SC-SC) 10 m (33 ft) NT7E46FB A0408375

SM Optical Patchcord (SC-SC) 15 m (49 ft) NT7E46FC A0408376

SM Optical Patchcord (SC-SC) 20 m (66 ft) NT7E46FD A0408377

SM Optical Patchcord (SC-SC) 30 m (98 ft) NT7E46FE A0408378

SM Optical Patchcord with mVOA (FC-FC) 5 m (16 ft.) NT7E47BA A0358876

SM Optical Patchcord with mVOA (FC-FC) 10 m (33 ft.) NT7E47BB A0365410

SM Optical Patchcord with mVOA (FC-FC) 15 m (49 ft.) NT7E47BC A0365411

SM Optical Patchcord with mVOA (FC-FC) 20 m (66 ft.) NT7E47BD A0365412

SM Optical Patchcord with mVOA (FC-FC) 30 m (98 ft.) NT7E47BE A0388575

SM Optical Patchcord with mVOA (ST-ST) 5 m (16 ft.) NT7E47CA A0358877

SM Optical Patchcord with mVOA (ST-ST) 10 m (33 ft.) NT7E47CB A0351096

SM Optical Patchcord with mVOA (ST-ST) 15 m (49 ft.) NT7E47CC A0351097

SM Optical Patchcord with mVOA (ST-ST) 20 m (66 ft.) NT7E47CD A0351098

SM Optical Patchcord with mVOA (ST-ST) 30 m (98 ft.) NT7E47CE A0388576

SM Optical Patchcord with mVOA (SC-SC) 5 m (16 ft.) NT7E47FA A0408379

SM Optical Patchcord with mVOA (SC-SC) 10 m (33 ft.) NT7E47FB A0408380

SM Optical Patchcord with mVOA (SC-SC) 15 m (49 ft.) NT7E47FC A0408381

SM Optical Patchcord with mVOA (SC-SC) 20 m (66 ft.) NT7E47FD A0408382

SM Optical Patchcord with mVOA (SC-SC) 30 m (98 ft.) NT7E47FE A0408383

SM Optical Pigtail (FC) 20 m (66 ft) NT7E48BA A0365308

SM Optical Pigtail (ST) 20 m (66 ft) NT7E48CA A0371187

SM Optical Pigtail (SC) 20 m (66 ft) NT7E48FA A0408384

—continued—



SM Optical Pigtail with mVOA (FC) 20 m (66 ft) NT7E49BA A0365416

SM Optical Pigtail with mVOA (ST) 20 m (66 ft) NT7E49CA A0371188

SM Optical Pigtail with mVOA (SC) 20 m (66 ft) NT7E49FA A0408385

Electrical cables

BNC connector for 734A Coaxial Cable CX01PS007 A060865

DS3 734A Coaxial Cable (BNC) 5 m (16 ft.) NT7E43AA A0351121

DS3 734A Coaxial Cable (BNC) 10 m (33 ft.) NT7E43AB A0370975

DS3 734A Coaxial Cable (BNC) 20 m (66 ft.) NT7E43AC A0370976

DS3 734A Coaxial Cable (BNC) 30 m (98 ft.) NT7E43AD A0370977

DS3 734A Coaxial Cable (BNC) 40 m (131 ft.) NT7E43AE A0370978

DS3 734A Coaxial Cable (BNC) 50 m (164 ft.) NT7E43AF A0370979

DS3 734A Coaxial Cable (BNC) 60 m (197 ft.) NT7E43AG A0370980

DS3 734A Coaxial Cable (BNC) 75 m (246 ft.) NT7E43AH A0370981

DS3 734A Coaxial Cable (BNC) 80m (262 ft.) NT7E43AJ A0373188

DS3 734A Coaxial Cable (BNC) 140 m (459 ft.) NT7E43AK A0373189

DS3 734A Coaxial Cable (BNC) 100 m (328 ft.) NT7E43AL A0375153

BNC connector for 735A Coaxial Cable CX01PS008 A060866

DS3 735A Coaxial Cable (BNC) 5 m (16 ft.) NT7E43BA A0408003

DS3 735A Coaxial Cable (BNC) 10 m (33 ft.) NT7E43BB A0408004

DS3 735A Coaxial Cable (BNC) 20 m (66 ft.) NT7E43BC A0408005

DS3 735A Coaxial Cable (BNC) 30 m (98 ft.) NT7E43BD A0408006

DS3 735A Coaxial Cable (BNC) 40 m (131 ft.) NT7E43BE A0408007

DS3 735A Coaxial Cable (BNC) 50 m (164 ft.) NT7E43BF A0408008

DS3 735A Coaxial Cable (BNC) 60 m (197 ft.) NT7E43BG A0408009

DS3 735A Coaxial Cable (BNC) 75 m (246 ft.) NT7E43BH A0408010

BNC connector for RG59 Coaxial Cable CX01PS009 A0619904

DS3 RG-59B/U Coaxial Cable (BNC) 5 m (16 ft.) NT7E42AA A0364731

DS3 RG-59B/U Coaxial Cable (BNC) 10 m (33 ft.) NT7E42AB A0365949

DS3 RG-59B/U Coaxial Cable (BNC) 20 m (66 ft.) NT7E42AC A0365950

DS3 RG-59B/U Coaxial Cable (BNC) 30 m (98 ft.) NT7E42AD A0365951

DS3 RG-59B/U Coaxial Cable (BNC) 40 m (131 ft.) NT7E42AE A0365952

DS3 RG-59B/U Coaxial Cable (BNC) 50 m (164 ft.) NT7E42AF A0365953

DS3 RG-59B/U Coaxial Cable (BNC) 60 m (197 ft.) NT7E42AG A0365954

DS3 RG-59B/U Coaxial Cable (BNC) 75 m (246 ft.) NT7E42AH A0365955

—end—

Table 5-2 (continued)Fiber and DS3 cable ordering codes

Cable description PEC CPC




6-1

Technical specifications 6-Table 6-1 summarizes the technical specifications (size, power requirements, interfaces—DS3 and OC3) for a DV-OC3 unit. Also see Technical Specifications, 323-1401-180, in the DV-45 Reference Manual, PEC NT2H7902.

Table 6-1 DV-OC3 unit technical specifications

Parameter Specification

General: • CSA/UL standards

• Packaging

• Alarm indications

• Safety

• MTBF

• MTTR

• Input connections

• Output connections

• Internal protection

• UL-1459; CAN/CSA C22.2 No. 225-M90; NEC (US)

• Fits in two slot positions in a DV-45 shelf

• Faceplate LEDs, parallel relay, and serial TBOS

• Nortel std #90001.12 and TA-NWT-1089, section 7

• 15 years (Bellcore v 3.0)

• 15 minutes (excluding travel time)

• One front FC, ST, or SC input connection

• Three rear DS3 BNC input connections

• One front FC, ST, or SC output connection

• Three rear DS3 BNC output connections

• None (could be provided using external DS3 switch boxes)

Power: • Voltage

• Dissipation

• Battery noise

• Electrostatic discharge

• -48 Vdc (-42 to -56)

• 30 watts

• Complies with TR-NWT-499

• 3 kV: no DS3 errors or picture defects; 6kV: < 100 errors or picture defect on one line; 8kV: no DS3 frame loss, alarm, or freeze frame; 20kV: no damage to equipment(Bellcore TR-TSY-000078 and TR-NWT-002089)

—continued—


6-2 Technical specifications

Environmental:• Temperature

• Relative humidity

• Electromagnetic interference

• Altitude

• Earthquake

• Flammability

• Shock

• Vibration

• Transportation bounce

• Normal: 0 to 40oC Short-term (< 72 hrs): 0 to 50oC Storage: -50 to +70oC

• Operating: 20 to 95%, 3.6 kPa vapour pressure Storage: 10 to 95%, 5.3 kPa vapour pressure

• Bellcore TR-NWT-002089 standard and FCC part 15, subpart B. class A

• Operating: to 4,000 m; Shipping: to15,000 m

• Zone IV

• Bellcore TR-TSY-0000063, TR-NWT-001089, NT std #4118.00

• Shipment drop height: 750 mm Unpacked drop height: 102 mm

• Operating: NEBS 5.6.3 Test 5CShipping: IEC 68-2-6 Test Fc Curve B

• Complies with IEC Draft 58

DS3 Interface:• Line rate

• Line code

• Line impedance

• Electrical standards

• Connector type

• 44.736 Mbit/s ± 20 ppm

• Bipolar with B3ZS

• 75 ohms ± 5% unbalanced

• TR-NWT-000499

• BNC at the rear of the DV-45 shelf

OC3 Interface:• Optical standard

• Maximum Tx power

• Minimum Tx power

• Extinction ratio

• Rx (IN) overload

• Rx sensitivity (at 1 x 10 -10 BER)

• Connector type

• SONET compatibility

• SONET TR-NWT-253 (non-compliance)

• OC3c

• SONET TR-NWT-000253 Intermediate reach (IR-1) and Long reach (LR-1) MLM OC3 at 1310 nm

• Long reach: 0 dBm; intermediate reach: -8 dBm

• Long reach: -5 dBm; intermediate reach: -15 dBm

• Long reach: 10; intermediate reach: 8.2



• FC, ST, or SC connectors on the front of the unit

• Connects to Nortel S/DMS Transport Node equipment and other vendor SONET equipment without raising alarms (for unidirectional, line FERF must be disabled)

• Orderwire (E1, E2); Section DCC (D1-3); Line DCC (D4-D12); APS signaling (K1, K2) disabled and a fixed code used (K2 bits 6-8 used to signal AIS and FERF); STS path trace (J1)

• not supported

Table 6-1 (continued)DV-OC3 unit technical specifications

Parameter Specification


7-1

Observing safety guidelines 7-This chapter describes the precautions that should be observed for the following:

• handling and working with DV-45 shelves

• handling, storing, installing, and replacing DV-45 units

• handling, splicing, and repairing optical fibers

DV-45 shelfThe following precaution must be taken when handling and working with a DV-45 shelf (this includes external cabinets, DV-45 shelves mounted inside the cabinets, and DV-45 units mounted in DV-45 shelves).

Wear a skin-contact antistatic bracelet when handling and working with a DV-45 shelf. This bracelet consists of an expandable wrist strap and grounding cord; its function is to rapidly dissipate charges to ground. Alternative personnel ground methods can be used; for example, conductive carpeting, conductive shoes, or heel grounding assemblies. An electrostatic discharge jack is located on the front of all heat deflectors equipped with fiber management.

DV-45 units Damage to units, particularly those that are sensitive to static electricity, may occur at any time. DV-45 units that are sensitive to static electricity are shipped in antistatic shipping bags and are marked with the following symbol.

Note: All DV-45 units must be installed or extracted by using the unit latches to ensure a secure mating with the backplane.

CAUTIONElectrostatic-sensitive devicesAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a board.


7-2 Observing safety guidelines

Handling unitsThe following precautions must be taken when handling DV-45 units:

• Wear a skin-contact antistatic bracelet when handling all units that are sensitive to static electricity. This bracelet consists of an expandable wrist strap and grounding cord; its function is to dissipate charges to ground.

• At all times, handle the units by the faceplate or stiffener.

• Do not touch the solder side, pin connector, or components.

• Do not stack units on top of, or against each other.

• Do not force units into the packaging material.

• Ensure that the transmit and receive optical connectors of optical units are protected by dust caps at all times.

Note: Alternative personnel grounding methods can be used; for example, conductive carpet, conductive shoes, or heel grounding assemblies.

Storing units Spare units must be left in the original shipping container until required.

To prevent damage to DV-45 units while they are in storage, necessary precautions must be observed, to avoid:

• accumulation of dirt or dust on the gold-plated contact

• defacing of printed wiring areas

• board warpage if stored in an area of high humidity and temperature.

Installing or replacing unitsTo prevent electrostatic damage, the following conditions apply during the installation or replacement of DV-45 units that are sensitive to static electricity:

• all units must be enclosed in static shielding bags for transportation

• upon reaching the trouble location, maintenance personnel must attach a antistatic bracelet before removing units

• suspect units must be removed and immediately placed in a static shielding bag

• all safety precautions listed under “Handling units” should be followed during installation and replacement of units.

Whenever possible use the original static shielding bag, padding, and box in which the DV-45 unit was received. If the original material is lost, use other suitable packing.


Observing safety guidelines 7-3

Optical fibersOptical fibers are either single or multiple strand. The following information and precautions apply to all fibers.

Laser radiationAll Nortel optical products and associated optical test sets use laser sources that emit light energy into fiber cables. This energy is within the red (visible) and infrared (invisible) regions of the electromagnetic spectrum.

Laser products are subject to federal regulations, state or provincial regulations, and local practices. Regulation 21CFR 1040 of the U.S. Bureau of Radiological Health requires manufacturers to certify each laser product as Class I, II, III, or IV depending on the characteristics of the laser radiation emitted. In terms of health and safety, Class I products present the least hazard (none at all), while class IV products present the greatest hazard.

During testing and maintenance, some procedures require the handling of optical fibers and transmitters with the dust caps removed. Under these circumstances, laser radiation within the limits of Class IIIb might be present.

This level of radiation is of sufficient magnitude to cause injury to personnel and caution must therefore be exercised to avoid exposure. This precaution applies to any point in the system where the laser signal can be accessed (for example, at the optical connectors on the front of DV-OC3 units).

Bending optical fibersThere is a risk of damaging optical fibers if they are bent too much. A minimum bending diameter of 76 mm (3 in.) is recommended. In addition, all optical connections to optical units should only be finger-tightened.

Handling optical fibersWhen working with optical fibers, you must observe the following precautions:

• Wear safety glasses when installing optical fibers.

• Avoid direct exposure to fiber ends or optical connector ends where the laser signal can be accessed.

All Nortel S/DMS transmission products comply with 21 CFR 1040, Chapter 1, subchapter J as a Class I laser product as set forth by the U.S. Bureau of Radiological Health. These regulations ensure that there are no personnel hazards from the laser

Avoid direct exposure to beam. Invisible light can blind. Keep all optical connectors capped.

transmitter when the system is in its operating configuration. A label similar to this is located on all optical interface packs, near the optical connector.

Caution



• Wipe clean or wash your hands after handling optical fibers. Small bits of glass are almost invisible and can damage your eyes.

• Do not handle pieces of optical fiber with your bare fingers. Use tweezers or the sticky side of a piece of vinyl tape to pick up and discard any loose fiber ends.

• Place all optical fiber cuttings in a plastic bottle provided for that purpose.

• Handle optical fibers with care. Position them in a safe and secure location during installation.

• Protect all optical fiber connectors with dust caps at all times.

• Follow the manufacturer’s instructions when using an optical test set. Incorrect calibration or control settings could result in hazardous levels of radiation.

Splicing optical fibersDuring the splicing of any fiber, you might be required to look at the fiber using an eye loupe (a small magnifier). Observe the following precautions:

• Before starting the splicing, power off all laser sources to the fiber or disconnect the remote fiber end from the laser sources.

• Ensure that the laser sources stay disconnected or powered off, whether the sources are located in a central office, subscriber premises, or a remote location.

• Before starting the splicing, disconnect any optical test sets from the fiber (whether locally or remotely connected).

• Use only the optical instruments approved by your company.

Repairing optical fibersWhen there is an accidental break in the fiber, you must do the following:

• Notify both equipment-office and field-repair personnel of the problem.

• Identify to the equipment-office personnel where the fibers have been damaged.

• Power off all laser sources to the fiber or disconnect remote fiber end from the laser sources, whether the sources are located in an equipment office, subscriber premises, or a remote location.

DANGERRisk of eye injuryIf there is any suspicion of a glass chip in your eye, seek medical attention at once.


Observing safety guidelines 7-5

Radio-frequency emissionsThe following regulatory notice applies to all Nortel SONET transmission products.

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, can cause harmful interference to radio communications. Operation of this equipment in a residential area can cause harmful interference, in which case users will be required to correct the interference at their own expense.




8-1

Installing and setting DV-OC3 unit options 8-

This chapter provides procedures for installing DV-OC3 units and setting unit options.

A DV-OC3 unit is part of the DV-45 system and is installed with other DV-45 equipment according to application requirements. This chapter only presents those procedures that are directly related to installing a DV-OC3 unit and setting the available options. For specific DS3 and OC3 connections to other equipment and the required option settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application or Option Settings for S/DMS TransportNode equipment).

RequirementsThe procedures in this chapter assume that:

• all DV-45 shelves have been installed

• the dc-power to all DV-45 shelves has been connected

• all DV-45 equipment DS3, other than OC3, connections have been made

• all cables are installed according to recommended practices

Refer to the Installation NTP, 323-1401-201, within the DV-45 Reference Manual, PEC NT2H7902.


8-2 Installing and setting DV-OC3 unit options

Chapter task list

Task See...

Installing a heat deflector and routing fiber cables page 8-3

Setting DV-OC3 unit options page 8-7

Installing DV-OC3 units in a DV-45 shelf page 8-10

Upgrading DV-45 MCU firmware page 8-15

Connecting DS3 signals to a DV-OC3 unit page 8-17

Cleaning and assembling optical connectors page 8-19

Measuring optical output power page 8-24

Measuring optical receive power page 8-27


Installing and setting DV-OC3 unit options 8-3

Procedure 8-1Installing a heat deflector and routing fiber cables

Use this procedure to install a DV-45 heat deflector with fiber management and route the fiber cables to and from the heat deflector.

Requirements The following tools and materials are required:

• cable ties

• flexible-tubing conduit

• DV-45 heat deflector with fiber management (NT2H51AC)

• slotted screwdriver

• wire cutters (flush cutting)

Action

Step Action

1 Install a DV-45 heat deflector with fiber management on the bay, directly above each DV-45 shelf which contain DV-OC3 units, as shown in Figure 8-1. Secure the heat deflector with the screws provided.

2 Remove the front grill of the heat deflector by turning the screws on each side by a quarter-of-a-turn.

The fiber cable storage space, securing clips, and miniature variable optical attenuator (mVOA) mounting brackets will be exposed.

3 Fasten the flexible tubing to the left frame upright using the cable ties.

Note: Flexible tubing and fiber cables must be placed on the left side because all cables must enter the heat deflector from the left. All cables must also be easily accessible after the cables have been routed and secured.

4 Route the office fiber cables from the overhead cable rack through the flexible-tubing conduit and down the left side of the bay.

5 Route the fiber cables into the heat deflector through the access funnel on the left side of the heat deflector. See Figure 8-2 and Figure 8-3.

—continued—

CAUTIONRisk of damaging fiber cablesHandle fiber cables with care. Observe a minimum bending diameter of 76 mm (3 in.) at all times when bending fibers. Optical connections to the DV-OC3 units should be finger-tightened.



Procedure 8-1 (continued)Installing a heat deflector and routing fiber cables

Figure 8-1Heat deflector with fiber management mounted on top of a DV-45 shelf

FW-0297.1

—continued—

482.6 mm(19 in.)

304.8 mm(12 in.)




Figure 8-2Fiber management

FW-3085

Figure 8-3Heat deflector with fiber management (viewed from the left)

FW-3077.1

—continued—

FW-3085

FW-3077.1




Step Action

6 If miniature variable-optical attenuators (mVOA) are used on the receive (IN) fibers, click them into one of the horseshoe-shaped holders provided.

Note 1: mVOAs are equipped with a screw adjustment mechanism. Attenuation is provided in relation to the number of turns (either clockwise or counterclockwise) of the screw. The screws are accessible through the grill vents. The attenuation of mVOAs is set to the minimum when shipped, and the position of the screw adjustment should not be changed until the optical cable integrity is verified.

Note 2: mVOAs may be required for use with long-reach DV-OC3 units. A mVOA is typically installed 1 m (3.3 ft) from the connector end of the receive (IN) fiber cable.

7 Route the transmit fiber to the appropriate DV-OC3 OUT terminal and the receive fiber to the corresponding IN terminal. Leave sufficient cable for assembling the cable optical connectors (see “Cleaning and assembling optical connectors” on page 8-19).

8 Coil the excess fiber cables and store them in the heat deflector storage space ensuring that coiled fiber cables have a minimum 76 mm (3 in.) diameter. Handle fiber cables with care. Secure the coiled fiber using the twist (horseshoe-shaped) cable clips provided.

Note: Any subsequent cabling should be done carefully to avoid damage to these fiber cables.

9 Reinstall the front grill.

—end—

CAUTIONRisk of damaging fiber cablesDo not hang fiber cables loose on the side of the bay frame. Always store excess fiber cables inside the heat deflector.



Procedure 8-2Setting DV-OC3 unit options

Use this procedure to set up a DV-OC3 unit prior to installing it in a DV-45 shelf. This procedure details the available options; for specific settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application).

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 7-1 for important information on how to handle DV-45 units.

Tools Antistatic bracelet

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 7-1. Attach the antistatic bracelet and ground it.

2 Remove the DV-OC3 unit from the shipping carton and the static protection bag. Detach the DS3 in/out label from the back of the DV-OC3 unit.

3 Refer to Figure 8-4 and use it to locate S1 on the DV-OC3 unit.

4 Set the sub-switches on S1 as shown in Table 8-1.

Table 8-1DV-OC3 unit S1 settings

—continued—

Switch Description Settings Function1 OC3 STS #1 Tx Set to 1 for equipped

Set to 0 for unequippedUse for equipping STS#1 to transmit a DS3 payload

2 OC3 STS #1 Rx Set to 1 for equippedSet to 0 for unequipped

Use for equipping STS#1 to receive a DS3 payload

3 OC3 STS #2 Tx Set to 1 for equippedSet to 0 for unequipped

Use for equipping STS#2 to transmit a DS3 payload



5 OC3 STS #3 Tx Set to 1 for equippedSet to 0 for unequipped

Use for equipping STS#3 to transmit a DS3 payload



7 OC3 Rx Line Set to 1 for equipped Set to 0 for unequipped

Use for equipping the OC3 line to receive an OC3 payload

8 OC3 Rx Loop Timed / Freerun

Set to 1 for Loop Timed Set to 0 for Freerun

Use for setting the DV-OC3 unit timing source



Procedure 8-2 (continued)Setting DV-OC3 unit options

Figure 8-4DV-OC3 unit showing location of switches S1 and S2, and EPROM U3

FW-3100

Note 1: By default, from the factory, all switches are set to the 1 position. The default settings equip all options and sets the unit to loop timing.

Note 2: Ignore markings on the actual switches (for example, “on” or “off”).

—continued—

ALARM STATUS

STS-DS3-1

UNITON

FAIL

S2 S1

OC3

STS-DS3-2

STS-DS3-3

In Out


1234567812345678

TX

1R

X1

TX

2R

X2

TX

3R

X3

OC

3 Rx

LOO

P

A B

OC3

LB01

LB02

LB03

ST

S-1

ST

S-2

ST

S-3

OC

3 U3



Procedure 8-2 (continued)Setting DV-OC3 unit options

Step Action

5 Refer to Figure 8-4 and use it to locate S2 on the DV-OC3 unit.

6 Identify the required cable range, see Table 8-2.

Table 8-2LBO ranges for the DS3 interfaces

7 Set the output line build out (LBO) circuitry for the DS3 interfaces using the sub-switches on S2 as shown in Table 8-3.

Table 8-3DV-OC3 unit switch S2 settings

8 See “Installing DV-OC3 units in a DV-45 shelf” on page 8-10, for instructions on inserting DV-OC3 units into a DV-45 shelf.

—end—

LBO switch setting Cable type and rangeRG-59 734A 735A

ON (=1) 0 - 50 m(0 - 164 ft)

0 - 70 m(0 - 230 ft)

0 - 70 m(0 - 230 ft)

OFF (=0) 50 - 76 m(164 - 250 ft)

70 - 137 m(230 - 450 ft)

70 - 137 m(230 - 450 ft)

Switch Description Settings Function1 OC3 DS3 #1 LBO1 Set to 1 for LBO ON

Set to 0 for LBO OFFUse to set the LBO for DS3#1

2 OC3 DS3 #2 LBO2 Set to 1 for LBO ONSet to 0 for LBO OFF

Use to set the LBO for DS3#2

3 OC3 DS3 #3 LBO3 Set to 1 for LBO ONSet to 0 for LBO OFF

Use to set the LBO for DS3#3

4 Not used Set to 1 5 STS-1 # 1

Unidirectional / BidirectionalSet to 1 for bidirectionalSet to 0 for unidirectional

Use to set the STS-1#1 signal direction

6 STS-1 # 2Unidirectional / Bidirectional

Set to 1 for bidirectionalSet to 0 for unidirectional


7 STS-1 # 3Unidirectional / Bidirectional



8 OC3 LineUnidirectional / Bidirectional


Use to set the OC3 line direction



Procedure 8-3Installing DV-OC3 units in a DV-45 shelf

Use this procedure to install DV-OC3 units in a DV-45 shelf after the option switches have been set.

A DV-OC3 unit requires two DV-45 shelf slots and can only be installed correctly into adjacent slot positions 0 and 1, 2 and 3, 4 and 5, or 6 and 7.

All DV-OC3 units are keyed to prevent installation in incorrect shelf positions. If resistance is felt when inserting a DV-OC3 unit, do not force the DV-OC3 unit into slots, check that the unit is being inserted into an allowable slot pair. Ensure that all units are properly seated in the backplane connector.

If a DV-OC3 unit is installed into an incorrect shelf position (and the keys are broken), an OC3 Configuration Fail major alarm is generated by the MCU.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 7-1 of this document for important information on how to handle units.

Tools Antistatic braceletFlat-bladed screwdriver

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 7-1 of this document. Attach the antistatic bracelet and connect it to ground or use an antistatic mat.

2 If necessary, remove the locking bar from the DV-45 shelf as shown in Figure 8-6.

3 Use Figure 8-7, Figure 8-8, and Figure 8-9 as guides for determining the DV-OC3 unit position in the DV-45 shelf.

Note: A DV-OC3 unit can only be installed into adjacent DV-45 shelf slot pairs 0 and 1, 2 and 3, 4 and 5, or 6 and 7.

4 Align the DV- OC3 unit with the slot and insert it part way into the slot.

5 Open the latches on the unit as shown in Figure 8-6 by squeezing lightly.

6 Insert the DV-OC3 unit the remainder of the way into the slot. Use the latches to fully seat the unit in the backplane connector.

7 Replace the locking bar when the last DV-45 unit has been installed.

—continued—



Procedure 8-3 (continued)Installing DV-OC3 units in a DV-45 shelf

Step Action

8 Using the supplied adhesive label, label the DS3 inputs and outputs as shown in Figure 8-5.

Note 1: Ensure that the label is placed on the slots that the DV-OC3 unit occupies.

Note 2: The adhesive label is supplied attached to the DV-OC3 unit.

Figure 8-5Rear DS3 interface BNC connections

FW-2377.2

—continued—

DS3-1 OUT

DS3-2 OUT

DS3-3 OUT

DS3-1 IN

DS3-2 IN

DS3-3 IN

OC3 Line Interface

VIDEOOUT/IN

VIDEOOUT/LOOP

DS3IN/OUT


CODEC 2

Slot 5


Slot 4 Slot 3




Figure 8-6DV-45 shelf showing locking bar

FW-3103.1

—continued—

Locking Bar

01

2

67

89

10

CAUTION




Figure 8-7DV-45 shelf equipped with a DV-OC3 unit in slots 4 and 5 (typical codec configuration for a DVN quad-split remote site)

FW-3101

Figure 8-8DV-45 shelf equipped with a DV-OC3 unit in slots 6 and 7 (typical codec configuration for a DVN 3DS3 continuous presence remote site)

FW-3101.1

—continued—

Position #

DecoderCoder MCUDCS

CAUTION

0 1 2 3 4 5 6 7 8 9 10

OC3

Decoder

CAUTION

Decoder

Position #

DecoderCoder MCUDCS

0 1 2 3 4 5 6 7 8 9 10

OC3




Figure 8-9DV-45 shelf fully equipped with DV-OC3 units (typical equipment-office optical hub configuration)

FW-3102

—end—

Position #

MCU

CAUTION CAUTION CAUTIONCAUTION

0 1 2 3 4 5 6 7 8 9 10

OC3OC3OC3 OC3



Procedure 8-4Upgrading DV-45 MCU firmware

Use this procedure to install a firmware upgrade in an existing DV-45 MCU (NT2H35EA and earlier) to upgrade it to handle DV-OC3 unit alarms and status data.

Note: New DV-45 MCUs, PEC NT2H35LA, already come equipped with the firmware to handle DV-OC3 unit alarms and status data.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 7-1 of this document for important information on how to handle units.

MaterialDV-45 MCU EPROM upgrade kit, PEC NT2H99LA

Tools Antistatic braceletAntistatic work surfaceFlat-bladed screwdriver

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 7-1 of this document. Attach the antistatic bracelet and connect it to ground or use an antistatic mat.

2 If necessary, remove the locking bar from the DV-45 shelf as shown in Figure 8-6 on page 8-12.

3 If necessary, remove the DV-45 MCU from the DV-45 shelf.

4 Place the DV-45 MCU onto the antistatic work surface and remove the U2 and U3 EPROMs. Refer to Figure 8-10 for the location of U2 and U3.

5 Install EPROM chip U2 (checksum 1EEE). Align the chip notch with the notch in the socket. Align the bottom pins of the EPROM with the bottom pins of the socket.

6 Repeat step 5 for EPROM chip U3 (checksum 5CC3).

7 Attach the adhesive label from the upgrade kit to the bottom latch of the MCU to identify it as an upgraded unit.

8 Check that the MCU options are set correctly (refer to your application documentation).

Note: The EPROM upgrade itself does not require any option changes.

—continued—



Procedure 8-4 (continued)Upgrading DV-45 MCU firmware

Step Action

9 Align the MCU with DV-45 shelf slot 10 and insert it part way into the slot.

10 Open the latches on the unit as shown in Figure 8-6 on page 8-12 by squeezing lightly.

11 Insert the unit the remainder of the way into the slot. Use the latches to fully seat the unit in the backplane connector.

12 Replace the locking bar.

Figure 8-10DV-45 MCU EPROM locations

FW-1692.1

—end—

MCU

SHELFALARM

MAJORMINOR

ALARMCONTROL

ACO

LAMP TEST

ALARMSTATUS

BAT ABAT B

REM

ORDERWIRE

C/D 1

C/D 2

C/D 3

C/D 4

SELECT

JACK

UNITON

FAIL

AlarmCut-Off

Lamp Test/Learn

U2 U3

8 S

yn A

larm

Ena

ble

7 R

emot

e A

larm

Ena

ble

6 X

-bit

Ena

ble

5 S

ingl

e A

ddre

ss4

TL1

(po

rt0)

3 E

2A M

appi

ng 1

/TL1

(po

rt1)

2 E

2A A

ddre

ss M

SB

0/N

ot U

sed

1 E

2A A

ddre

ss L

SB

0/N

ot U

sed

Syn

c A

larm

Dis

able

Rem

ote

Ala

rm D

isab

leX

-bit

Dis

able

Dua

l Add

ress

E2A

(po

rt0)

E2A

Map

ping

2/D

VLN

(po

rt1)

E2A

Add

ress

MS

B 1

/Not

Use

dE

2A A

ddre

ss L

SB

1/N

ot U

sed

SW3 SW4

DVLN Address

8

7

6

5

4

3

2

1

B

A



Procedure 8-5Connecting DS3 signals to a DV-OC3 unit

Use this procedure to connect DS3 input and output signals to a DV-OC3 unit.

RequirementsA single DV-OC3 unit can support up to three independent bidirectional DS3 channels. It is important to connect associated DS3 input and output signals to the correct DS3 channel. This procedure assumes that the DS3 cables have already been routed to the DV-45 shelf and identified in preparation for connection to the DV-OC3 unit.

Tools Wire strippersBNC crimping toolAntistatic bracelet

MaterialsRG-59B/U, 734A, or 735A coaxial cable BNC male connectorsBNC right-angle adapters

Action

Step Action

1 Identify the required DS3 cables at the rear of the DV-45 shelf.

2 Cut the cables to the appropriate length. Consider cable dressing requirements before cutting the cables.

3 Following standard procedure for BNC cable assembly, strip the DV-45 shelf ends of the cables and install male BNC connector on each cable.

4 Attach the antistatic bracelet and attach it to ground.

5 At the rear of the DV-45 shelf, identify the codec positions occupied by DV-OC3 units.

6 Using the supplied adhesive label (after detaching it from the DV-OC3 unit), label the DS3 inputs and outputs as shown in Figure 8-11.

Note 1: Ensure that the label is placed on the slots that the DV-OC3 unit occupies.

Note 2: The adhesive label is supplied attached to the DV-OC3 unit.

—continued—



Procedure 8-5 (continued)Connecting DS3 signals to a DV-OC3 unit

Figure 8-11Rear DS3 interface BNC connections (showing a DV-OC3 unit in slots 4 and 5)

FW-2377.2

7 Connect a right-angle adapter to each labelled DS3 input and output.

8 Connect each DS3 BNC-terminated cable to the appropriate DS3 terminal.

9 Record the DV-45 slot and shelf numbers and the DS3 signal source/destination for configuration purposes.

—end—

DS3-1 OUT

DS3-2 OUT

DS3-3 OUT

DS3-1 IN

DS3-2 IN

DS3-3 IN

OC3 Line Interface

VIDEOOUT/IN

VIDEOOUT/LOOP

DS3IN/OUT


CODEC 2

Slot 5


Slot 4 Slot 3



Procedure 8-6Cleaning and assembling optical connectors

Input and output OC3 fiber optic connections are made using optical connectors at the front of the DV-OC3 unit. Connecting the optical signals involves cleaning and assembling FC, ST, or SC type connectors.

Note: When errors occur during testing or in-service operation, clean the DV-OC3 unit optical connectors.

RequirementsPrior to carrying out this procedure on an in-service system, you must:

• ensure that traffic has been removed from the optical interface, as this procedure necessitates disconnecting the fiber from the DV-OC3 unit.

Tools and materials

—continued—

Can of compressed air (CG Electronics “Airjet II” or equivalent using a designated CFC replacement)

Alcohol dispenser (Lenline SD-18 or equivalent)

Fiberscope with 200X magnification (Seikoh Gikens “Clearfocus”, Bausch & Laumbe eye loupe or equivalent)

Long-nose pliers

Antistatic bracelet

Nonabrasive, low-lint, disposable cloth or tissue (Texwipe Absorbond lint-free cloth or Kimwipes)

Lens paper (Fisher Scientific #11-995 or equivalent)

Lint-free pipe cleaners

Alcohol, reagent grade (99.9% pure), ethanol (denatured), or isopropyl alcohol

DANGERRisk of eye injury At all times when handling optical fibers, follow the safety procedures in “Observing safety guidelines” on page 7-1 of this document, and those recommended by your company.

Avoid direct exposure to laser beam or fiber. Invisible light that can blind is present. Keep all optical connectors capped.



Procedure 8-6 (continued)Cleaning and assembling optical connectors

Action

Step Action

1 Observe all the precautions described in “Observing safety guidelines” on page 7-1. Put on an antistatic bracelet and attach it to ground.

Cleaning optical connectors mated to the DV-OC3 unit2 Loosen one of the fiber patchcords from the shelf fiber guide to provide

sufficient slack.

3 Disconnect the optical patchcord from the DV-OC3 unit.

4 Cover the exposed connector sleeve end with a clean dust cap. Do not use dust caps that have been in a dusty location, such as on the floor or in pockets.

Cleaning optical connectors on new patchcords or testcords5 Insert the connector that requires cleaning into the magnifier and assess the

cleanliness of the connector.

6 Remove the connector from the magnifier.

7 Holding the can of compressed air in an upright position, apply a short burst of air perpendicular to the ferrule of the connector, that is, across the end face.

8 Moisten a new, low-lint cloth with alcohol.

Note: Never reuse cleaning cloths. Use new material for each connector.

9 Applying moderate pressure, wipe the ferrule—by rotating the connector along the barrel—and the ferrule tip until the ferrule squeaks.

This removes any contaminants on the ferrule.

10 Immediately, apply a short burst of air perpendicular to the ferrule, to evaporate the alcohol.

11 Polish the ferrule tip by wiping it on a new, clean piece of lens tissue using one or two figure-eight patterns. This polishes off any residue remaining on the ferrule tip.

12 Finally, apply a short burst of air perpendicular to the ferrule tip. This removes any remaining airborne particles.

13 Reinsert the connector into a fiberscope and assess the cleanliness of the connector.

If the connector still looks dirty, remove the connector from the magnifier and repeat steps 8 through 13.

14 Remove the connector from the fiberscope, making sure that the connector end face and ferrule do not come into contact with any contaminants (dust, lint, or hands).

—continued—




Step Action

15 Locate the desired subtask:

16 Assemble the optical patchcord (or test cord) to the DV-OC3 unit:

Assembling an FC connector17 Gently insert the ferrule into the sleeve. Ensure that the guide pin enters the

guide slot. See Figure 8-12.

18 Grasp the heat-shrink cable to keep the ferrule from rotating, while you gently screw the plug retainer onto the sleeve threads. Tighten the connection finger-tight.

19 Seat the tips of the fiber cables by gently pushing the heat shrink cable onto the plug.

20 Repeat steps 5 through 16 for the second connector. Then go to step 28.

Figure 8-12FC connector assembly

FW-3352

—continued—

If you are Then

Replacing a patchcord or performing a test

Remove the existing patchcord from the DV-OC3 unit. If you are performing a test, cover the end of the patch cord with a clean dust cap as soon as the patchcord has been disconnected.

Cleaning an existing patchcord connector

Remove the dust cap on the connector sleeve.

If you are connecting a Then go to

FC connector step 17

ST connector step 21

SC connector step 25

FW-10808

Guide slot

Sleeve thread

Guide pin Heat-shrink cable

Ferrule

Plug retainerSleeve

Ferrule tip(end face)




Step Action

Assembling an ST connector21 Gently insert the ferrule into the sleeve so that the guide pin enters the guide

slot, as shown in Figure 8-13.

22 Rotate the plug retainer so that the retaining pin enters the retaining groove.

23 Push the connectors together and seat the tips of the fiber cables by gently pushing the heat-shrink cable.

24 Repeat steps 5 through 16 for the second connector. Then go to step 28.

Figure 8-13ST connector assembly

FW-3353

Assembling an SC connector25 Gently insert the ferrule into the sleeve so that the guide pin enters the guide

slot, as shown in Figure 8-14.

26 Grasp the plug retainer and gently push it into the connector to lock it in.

27 Repeat steps 5 through 16 for the second connector, then go to step 28.

—continued—

FW-10809

Retaining groove

Ferrule

Retaining pin

Sleeve Plug retainer

Guide slot Guide pin

Ferrule tip(end face)




Figure 8-14SC connector assembly

FW-2968

Step Action

28 Insert each patchcord into the shelf fiber guide.

29 Check the optical output power. See “Measuring optical output power” on page 8-24.

30 Check the integrity of the optical cables.

31 If the optical output power or optical cable integrity are not satisfactory, remove the patchcord connectors from the DV-OC3 unit and cover the ends with clean dust caps (see procedure steps 1 to 4).

32 Replace the DV-OC3 unit.

33 Repeat this procedure from step 15. If problems persist after replacing the DV-OC3 unit, contact your next level of support.

—end—

FW-2968

Guide pin

Guide slot

Plug retainer

FerruleSleeve



Procedure 8-7Measuring optical output power

Use this procedure to measure the output power from any optical interface. Keep a record of the results of these tests in your system administration system.

This test must be carried out each time a new optical interface is installed in a DV-45 shelf.

RequirementsPrior to carrying out this test, you must:

• ensure that the optical power meter is properly calibrated, as detailed in the owners manual

• ensure that the OC3 channel is out of service

• all connectors (on the optical interface and the test cord) have been properly cleaned (see “Cleaning and assembling optical connectors” on page 8-19)

Tools• Optical power meter (1310 nm) with a range of -50 to + 5 dBm

• Optical test cord, single-mode, 5 m (16 ft) long. Use:NT7E46BA for FC connectorsNT7E46CA for ST connectorsNT7E46DA for SC connectors

• Antistatic bracelet

.

—continued—

DANGERRisk of personal injuryAvoid direct exposure to laser beam or fiber. Invisible light that can blind is present. Keep all optical connectors capped.

CAUTIONRisk of equipment damageOptical connector performance can be adversely affected by dust. All connectors should be cleaned (see “Cleaning and assembling optical connectors” on page 8-19) prior to insertion in mating sleeves.



Procedure 8-7 (continued)Measuring optical output power

Action

Step Action


2 Select the DV-OC3 unit that you are going to test and remove the optical fibers if they are connected.

3 Set the optical power meter to measure the 1310 nm transmitter wavelength.

4 Connect one end of the optical test cord to the optical power meter and the other end to the Out optical connector on the DV-OC3 unit (see Figure 8-15).

Figure 8-15Optical power output measurement

FW-0237.1

—continued—

CAUTIONRisk of damaging circuit packsAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a DV-OC3 unit.

ALARM STATUS

STS-DS3-1

UNITON

FAIL

OC3

STS-DS3-2

STS-DS3-3

In Out

CAUTION

Optical power meter(properly calibrated)

DV-45 shelf

DV-OC3 unit

Avoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.

Optical test cord



Procedure 8-7 (continued)Measuring optical output power

Step Action

5 Measure the optical output power and record the result.

The measured power must be greater than (that is, nearer to zero) or equal to, the following minimum value:

6 If the minimum optical power is not met, carry out the following steps in turn:

a. Disconnect and reconnect both connectors and repeat step 5.

b. Replace the optical test cord and repeat step 5.

c. Reseat the DV-OC3 unit and repeat step 5.

d. Clean all optical connectors as described in “Cleaning and assembling optical connectors” on page 8-19 and repeat step 5.

e. Replace the DV-OC3 unit and repeat step 5.

7 Record all measurements and report them to your system administrator.

8 Disconnect the optical test cord from the Out optical connector on the front of the DV-OC3 unit.

9 Repeat this procedure as required, to test all the DV-OC3 unit optical interfaces installed in the DV-45 shelf.

—end—

Module type Minimum Requirement

Long-reach DV-OC3 connectors −5 dBm

Intermediate-reach DV-OC3 connectors −15.0 dBm



Procedure 8-8Measuring optical receive power

Use this procedure to measure the optical power received over the fiber link. The received optical power must be higher than the minimum and lower than the overload. Attenuation may need to be added if the power level is too high. Intermediate-reach units are designed to operate without additional attenuation.

Keep a record of the results of these tests in your system administration system.

This test must be carried out each time a new optical interface is installed in a DV-45 shelf.

RequirementsPrior to carrying out this test, you must:

• ensure that the optical power meter is properly calibrated, as detailed in the owners manual

• ensure that the OC3 channel is out of service

• all connectors (on the optical interface and the test cord) have been properly cleaned (see “Cleaning and assembling optical connectors” on page 8-19)

Tools• Optical power meter (1310 nm) with a range of -50 to + 5 dBm

• Optical test cord, single-mode, 5 m (16 ft) long. Use:NT7E46BA for FC connectorsNT7E46CA for ST connectorsNT7E46DA for SC connectors

• Antistatic bracelet

—continued—



Procedure 8-8 (continued)Measuring optical receive power

.

Action

Step Action


2 Select the DV-OC3 unit that you are going to test and remove the optical fibers if they are connected.

3 Set the optical power meter to measure the 1310 nm transmitter wavelength.

4 Disconnect the In optical connector from the DV-OC3 unit. Insert the connector into the optical power meter (see Figure 8-16).

—continued—

DANGERRisk of personal injuryAvoid direct exposure to laser beam or fiber. Invisible light that can blind is present. Keep all optical connectors capped.

CAUTIONRisk of equipment damageOptical connector performance can be adversely affected by dust. All connectors should be cleaned (see “Cleaning and assembling optical connectors” on page 8-19) prior to insertion in mating sleeves.

CAUTIONRisk of damaging circuit packsAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a DV-OC3 unit.



Procedure 8-8 (continued)Measuring optical receive power

Figure 8-16Optical power reception measurement

FW-4805

Step Action

5 Ensure that the received optical power is greater than the minimum and less than the overload (maximum) level.

Note: If the received power exceeds the maximum then attenuation must be added.

6 Adjust the mVOAs (if used) to an intermediate level. The recommended setting is −20 dBm.

Note: Intermediate-reach units are designed to operate without additional attenuation.

—end—

DV-OC3 unit Minimum Maximum

Intermediate-reach DV-OC3 connectors −28 dBm −8 dBm

Long-reach DV-OC3 connectors −24 dBm −10 dBm

ALARM STATUS

STS-DS3-1

UNITON

FAIL

OC3

STS-DS3-2

STS-DS3-3

In Out


ALARM STATUS

STS-DS3-1

UNITON

FAIL

OC3

STS-DS3-2

STS-DS3-3

In Out


G2

Opticalpowermeter

G1

Rx G2

Tx G2

Rx G1

Tx G1

Fibercross-connect

Fiber cable

= Miniature variable optical attenuator (mVOA)

RXfiber

TXfiber





Digital Video CodecDV-45DV-OC3 Unit Reference Manual

1995 Northern TelecomAll rights reservedInformation subject to change without notice

NTP number: 323-1401-380PEC: NT2H7908

FW02 3.01 StandardSeptember 1995Printed in Canada

Documents

DV-OC3 Unit Reference Manual - WriteDocwritedoc.com/resume/projects/Nortel/documents/dv45/380.pdf · DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard FiberWorld Transmission