MAN-22060-US004_C00_SSMTT-27M2_GSM_mmd

1SSMTT-27M2

GSM Option for the

E1 Module

Part of the MTT and

xDSL

Family of Products

User’s Manual

SSMTT-27M2

302 Enzo Drive San Jose, CA 95138

Tel: 1-408-363-8000 Fax: 1-408-363-8313

MAN-22060-US004 Rev C00

2 GSM for the E1 Module

WARNINGUsing the supplied equipment in a manner not specified by Sunrise Telecom mayimpair the protection provided by the equipment.

CAUTIONS• Do not remove or insert the module while the test set is on. Inserting or re -

moving a module with the power on may damage the module.• Do not remove or insert the software cartridge while the test set is on. Oth -

erwise, damage could occur to the cartridge.

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©2010 Sunrise Telecom Incorporated. All rights reserved.

Disclaimer: Contents subject to change without notice.

3SSMTT-27M2

GSM for E1 Module

1 GSM Analysis Menus ....................................... 5

1.1 Abis/A-ter Channel Monitor ..............................................6

1.2 A Channel Monitor ............................................................9

1.3 Protocol Analysis ............................................................101.3.1 Configuration ...............................................................101.3.2 Protocol Analysis .........................................................12

1.3.2.1 Filter..........................................................................121.3.2.2 Capture Traces .........................................................17

1.3.3 View/Print/Save Traces ................................................18

1.4 GPRS Statistics ..............................................................221.4.1 GPRS Configuration ....................................................221.4.2 GPRS A-bis Statistics ..................................................24

1.5 TRAU Testing ..................................................................26

2 Applications .................................................... 29

2.1 A-bis Monitoring .............................................................29

3 Reference ........................................................ 31

3.1 GSM Technology Overview ............................................31

3.2 GSM Radio Transmission ...............................................33

3.3 GSM Protocol .................................................................34

3.4 TRAU Frames .................................................................36

3.5 GPRS .............................................................................38

4 General Information ........................................41

4.1 Testing and Calibration Statement ..................................41

4.2 Ofces ............................................................................41

4.3 Express Limited Warranty ...............................................43

Index ..................................................................... 45


5SSMTT-27M2

1 GSM Analysis Menus

The GSM/GPRS Abis menu, as shown in Figure 1, contains GSM

and GPRS features. You must be in PCM-31 framing to access

GSM.

PROTOCOLS

OTHER MEASUREMENT

MEASUREMENT RESULT

TEST PATTERN

TEST CONFIGURATION

VF CHANNEL ACCESS

OTHER FEATURES

SYSTEM PARAMETERS

VIEW/STORE/PRINT

PROFILES

For all items other than PROTOCOLS,

see the appropriate section in the

SSMTT-27 User’s Manual.

MODULE

Key

E1 MAIN MENU

TRAU TESTING

1.5

GSM/GPRS

GPRS STATISTICS

1.4

PROTOCOL ANALYSIS

1.3

A CHANNEL MONITOR

1.2

Abis/A-ter CHANNEL MONITOR

1.1

GSM ANALYSIS

1

PROTOCOLS

For all items other than GSM

ANALYSIS, see the appropriate option

User’s Manual.

GSM Abis ANALYSIS

PROTOCOL ANALYSIS

1.3.2

CONFIGURATION

1.3.1

GPRS Abis

GPRS Abis STATISTICS

1.4.2

CONFIGURATION

1.4.1

VIEW/PRINT RESULTS

See VIEW/STORE/PRINT in the

SSMTT-27 User’s Manual.

PROTOCOL ANALYSIS

VIEW/PRINT/SAVE TRACES

1.3.3

CAPTURE TRACES

1.3.2

FILTER

1.3.1

Figure 1 GSM Analysis Menu

The GSM (Global System for Mobile communication) and GPRS

(General Packet Radio Service) testing option features enhance

your measurement capabilities to ensure the performance of

these networks.


1.1 Abis/A-ter Channel Monitor

Use these screens to monitor GSM traffic and channel occupan-

cies on Abis GSM network lines.

TEST MODE: E1SINGL TEST MODE: E1DUAL

Figure 2 Abis/A-ter GSM Monitor Screens

The format of the display will depend on if the test set is congured

for E1SINGL or E1DUAL, and in an 8K or 16K display. See Sec-

tion 2.1-Test Configuration in the SSMTT-27M or -27LM User’s

Manual for set up information.

The right DOWNLINK screen shown in Figure 2 is a sample of

E1DUAL mode, where information for both lines is displayed on

one screen. Press F1 to move to the individual line (LINE 1 or

LINE 2) screen. Press F1 again and you will return to the L1+2

display.

When only one line has been selected in E1DUAL mode, the

screen will appear as the left in Figure 2, except for changes in

the F-keys; F1 will be the LINE 1 or LINE 2, F2 the DECODE

choice, while F4 remains JUMP.

In E1SINGL mode or with the SSMTT-27-LM module, the screen

will appear as the right one in Figure 2.

• Use 8K/16K (F2) to monitor the 8 kbit/s and 16 kbit/s subchan-

nels. 8K is used for half-rate speech channels.

When monitoring the link, the physical line and framing informa-

tion are reported:

• “FRM LOSS”: Lost frame

• “SIG LOSS”: Loss of signal for the specic line.

• Observe the Uplink and/or Downlink direction, and the received

timeslot/subchannel activity, reading the timeslots across the

screen.

7SSMTT-27M2

The following are screen symbol denitions:

A = 16 kbit/s signalling

Abis = 64 kbit/s signalling

E = Extended Data

D = Data

I = Idle (speech idle)

M = Operations and Maintenance

S = Speech (Full Rate, Enhanced Full Rate, Half Rate)

P = PCU (GPRS, optional)

- = Idle channel

FASW: Frame Alignment Signal Word

GSM LINE F-keys

JUMP (F3 or F4): Move between timeslots groups. Use

to move between individual timeslots. The Uplink and

Downlink channels will move simultaneously if in E1DUAL mode,

so that both sides of a single link will be monitored.

DECODE (F1): With the cursor on an “S” (active speech channel in

Figure 2), press SPEECH (F1) and one of the VOICE DECODING

screens shown in Figure 3 will be displayed. The selected voice

channel is also heard through the test set speaker.

Dual uplink and downlink Line 1

Figure 3 Abis/A-ter GSM Voice Decoding Screens

If in E1DUAL mode while monitoring both sides of a conversation,

press DECODE (F1) to hear both lines on the test set speaker.

If using a headset, one line will be heard at each ear. Line 1 will

be on the left, and Line 2 will on the right.

Note: If in E1DUAL mode, but on a single line display screen,

the line for the displayed screen will be heard after pressing

DECODE (F1).

START (F3) must be pressed to listen to the decoded RPE-LTP

speech signal. Press STOP (F3) to mute the speaker.


The following are reported:

LINE 1/2 T/S: Line in use (1 or 2), and individual timeslot that is

being viewed.

S/C: Sub-Channel

UP/DOWNLINK: Link direction, as well as the voice encoding.

TIME ALIGNT: Time Alignment

LVL: Level of the A-law PCM voice, in dBm.

C1-C21: Overhead C-bits of the TRAU frame; displayed grouped

by the information they present.

For Uplink Decoding

#BFI: Number of Bad Fame Indicators; errored frames.

#DTX: Number of Discontinuous Transmission Mode frames;

transmitted frames not carrying data.

For Downlink Decoding

UFE: Uplink Frame Error

9SSMTT-27M2

1.2 A Channel Monitor

Use this feature to monitor GSM traffic and channel occupan-

cies on A GSM network lines. This feature is similar to Abis/A-ter

GSM Channel Monitoring, see Section 1.1 for screen items not

explained in this section.


MEAS 11:30:30

T/S GSM LINE 1

0 FASW - - - - -

6 - - - - - A

12 - - - - A -

18 - - - - - -

24 - - - - - -

30 - -

DECODE JUMP

MEAS 11:30:30

T/S GSM LINE 1

0 FASW - - - - -

6 - - - - - A

12 - - - - A -

18 - - - - - -

24 - - - - - -

30 - -

T/S GSM LINE 2

0 FASW - - - - -

6 - - - - - A

12 - - - - A -

18 - - - - - -

24 - - - - - -

30 - -

LINE 1 DECODE JUMP

Figure 4 A GSM Monitor Screens

The following are screen symbol denitions:

A: Active channel (speech or data)

-: Idle channel

FASW: Frame Alignment Signal Word

Select an active channel and press DECODE (F1 or F2) to view

the VOICE DECODING screen shown in Figure 5.


MEAS 11:30:30

VOICE DECODING

LINE : 1 T/S: 16

LEVEL: -12.0 dBm

STOP RETURN

MEAS 11:30:30

VOICE DECODING

LINE : 1 T/S: 16

LEVEL: -12.0 dBm

LINE : 2 T/S: 16

LEVEL: -12.0 dBm

STOP RETURN

Figure 5 A GSM Voice Decoding Screens


LINE: Line in use (1 or 2).

T/S: Individual timeslot that is being viewed.

LEVEL: Level of the A-law PCM voice, in dBm.

VOICE DECODING F-keys

STOP/START (F3): Stop the decoding and restart it.

RETURN (F4): Return to the GSM screen in Figure 4.


1.3 Protocol Analysis

This menu screen contains the following:

• CONFIGURATION

• PROTOCOL ANALYSIS

1.3.1 Configuration

The test set must be set for a full

rate, to enter GSM A-bis. A

“SYSTEM CONFIGURATION”

and an SRAM card formatting

message (if necessary) will be

displayed before the screen

appears. The test set will config-

ure itself to PCM-31 line coding.

Figure 6 GSM Abis Con-figuration Screen

Congure the following:

RATE

Options: 64K (F1), 16K (F2)

Select the A-bis rate.

• Signalling channels are 64K.

• 64K channels are used when the TRAU is on the BTS side.

• Trafc channels are 16K.

• 16K channels are used when TRAU is on the BSC/MSC side.

• If 16k is selected, congure the subchannel.

CRC-4

Options: ON (F1), OFF (F2)

Determine if CRC-4 error checking will be enabled.

SIGNALLING T/S

Options: 1—31

Specify the received timeslot by pressing PREV (F1) or NEXT

(F2).

SUB-CHANNEL (N/A at 64K rate)

Options: 1—4

Select the receive subchannels, from 1—4, if using a 16K rate by

pressing PREV (F1) or NEXT (F2).

L1-RX/L2-RX

Options: TERM (F1), BRIDGE (F2), MONITOR (F3)

11SSMTT-27M2

Specify the line interface mode for testing.

• TERM: Used when sending and receiving an E1 signal. It is

the most common mode used for out-of-service testing. The

test set terminates the received signal with a low impedance

termination, and requires that the circuit be disrupted for testing.

A 75Ω termination is used for BNC and 1.6/5.6 mm connec -

tors. A 120Ω termination is used for BR2 and 3-pin banana

connectors.

• BRIDGE: This is similar to Monitor mode. However, in Bridge

mode, the test set applies high impedance isolation resistors to

the circuit under test. This protects the signal from disruptions. It

is most commonly used for testing live circuits.

Note if connecting to the circuit through a MON jack to the

test set while in Bridge mode, this can result in two isolation

circuits on the signal. This may cause the test set to report a

loss of signal and be unable to perform measurements.

• MONITOR: Used for monitoring from a protected monitoring

point. The signal is provided from the MON jack of an E1 network

element. The network element has isolated the monitor signal

from the live signal with high impedance resistors. The test set

has an AGC (Automatic Gain Control) circuit to compensate for

the resistive loss of -15 dB to -30 dB. If the signal source is not

a resistively attenuated monitor output signal, the AGC will not

operate properly, and as a result, code error and/or other problem

indicators will be shown on the test set.

This mode is useful because it protects the live signal from

possible disruptions caused by the testing process. It allows

observing the line while the circuit is operational.

SAPI /TEI FORMAT

Options: HEX (F1), DECIMAL (F2)

Select the formatting of the SAPI and TEI.

LYR2 CTRL FIELD

Options: MOD8 (F1), MOD128 (F2)

Select the Layer 2 control field.

• MOD8: Modulo 8 sequence numbering.

• MOD128: Modulo 128 sequence numbering, the ETSI speci-

fied method.


1.3.2 Protocol Analysis

This menu screen contains the following selections:

• FILTER

• CAPTURE TRACES

• VIEW/PRINT/SAVE TRACES

1.3.2.1 Filter

To enter numbers in this screen,

press SHIFT or EDIT (F1) and

use the numeric keypad. Press

<- (F2) to backspace.

Figure 7 A-bis Filter Setup

Screen


FILTER STATUS

Options: ON (F1), OFF (F2)

• ON: Allows for setting Layer 1, 2, and 3 lters, as explained

below. “Filt” appears on screen when ltering is enabled.

• OFF: No lters are used; capturing all messages.

• Note that ltering may be done before (prelter) or after (post-

lter) capturing traces.

LAYER 1

Options: REJECT (F1), CAPTURE (F2)

• REJECT: Reject Layer 1 alarm information.

• CAPTURE: Capture all Layer 1 information.

LAYER 2


• REJECT: Reject Layer 2 messages.

• CAPTURE: Capture all Layer 2 messages.

SAPI

Options: ALL (F3), any 1 or 2 digit number

Service Access Point Identier identies the Layer 3 signalling

protocol.

• ALL: All SAPIs are captured.

• A specic number can be entered to lter out others.

13SSMTT-27M2

TEI

Options: ALL (F3), any 1 or 2 digit number

Terminal Endpoint Identier identies the TRX. TEI values 0—63

(00—3F, hex) are reserved for xed addresses. Values 64—126

(40—7E, hex) are used for additional addresses to TRXs needing

more than one signalling l ink.

• ALL: All TEIs are captured.

• A specic number can bee entered to lter out others.

LAYER 3


• REJECT: Press to reject Layer 3 messages.

• CAPTURE: Press to capture Layer 3 messages.

MSG DISC

Options: ALL (F1), RLL_MGT (F2), DC_MGT (F3), CC_MGT

(more, F1), TRX_MGT (more, F2), RESERVD (more, F3)

The Message Discriminator allows for discriminating between RRL

(Radio Link), DC (Dedicated Channel), CC (Common Channel),

and TRX management. Reserved messages are reserved for

future use; they may be proprietary to their constructors, reserved

for the government, etc.

MSG TYPE

Options: Hex code from 00 to 7F.

This lter allows capturing a specic message. Tables 1-4, outline

the different message types implemented on the test set.

Hex

Code

Msg

Type

Meaning

01 DataRequest

Sent in BCS-BTS direction to request sending of amessage in multiframe mode.

02 Data Indi-

cation

Sent in BTS-BSC direction to indicate the recep-

tion of a message in multiframe mode.

03 Error In-

dication

Sent from BTS to BSC to indicate an abnormal

case for a RLL connection.

04 EstablishRequest

Sent in BSC-BTS direction to request the es-tablishment of a radio link layer connection in

multiframe mode.

05 EstablishConfirm

Sent in BTS-BSC direction to conrm the es-tablishment of a radio link layer connection in

multiframe mode.

06 EstablishIndication

Sent in BTS-BSC direction to indicate the es-tablishment of a radio link layer connection in

multiframe mode.

Radio Link Layer Message Types table continues...


HexCode

MsgType

Meaning

07 Release

Request

Sent in BSC-BTS direction to request the release

of a radio link layer connection in multiframemode.

08 Release

Confirm

Sent in BTS-BSC direction to conrm the release

of radio link connection in multiframe mode.

09 ReleaseIndication

Sent in BTS-BSC direction to indicate the releaseof a radio link layer connection in multiframe

mode.

0A Unit DataRequest

Sent in BSC-BTS direction to request the send-ing of a message in unacknowledged mode on a

radio link layer connection.

0B Unit DataIndication

Sent in BTS-BSC direction to indicate the recep-tion of a message in unacknowldeged mode on a

radio link layer connection.

Table 1 Radio Link Layer Message Types

HexCode

Msg. Type Meaning

11 BCCH

Information

Sent from BSC to BTS to indicate new informa-

tion to be broadcast from BCCH.

12 CCCH

Load

Indication

Sent from BTS to BSC to indicate current load

on CCCH.

13 Channel

Required

Sent in BTS-BSC direction to indicate the

reception of a Channel Request message froman MS.

14 Delete

Indication

Sent from BTS to BSC to indicate the deletion

of an access grant message (IMMediate AS-SIGN) due to overload of downlink CCCH.

15 Paging

Command

Sent in BSC-BTS direction to request the pag-

ing of an MS..

16 Immedi-ate Assign

Command

Sent in BSC-BTS direction to request thetransmission of an immediate assign message

to the MS.

17 SMSBroadcast

Request

Sent from BSC to BTS to request the paging ofan MS.

1D SMS Broadcast Command

1E CBCH Load Indication.

1F Notification Command

Table 2 Common Channel Message Types

Hex

Code

Msg. Type Meaning

15SSMTT-27M2

19 RFResource

Indication

Sent from BTS to BSC to indicate the interfer-ence level on idle channels of a TRX.

1A SACCHFilling

Sent in BSC-BTS direction to indicate the newbroadcast information to be used as filling

information on SACCH.

1B Overload Sent in BTS-BSC direction to indicate an over-load situation.

1C Error

Report

Sent from BTS to BSC to report a detected errorthat can’t be reported in any other message.

Table 3 TRX Message Types

HexCode

Msg Type Meaning

21 Channel

Activation

Sent in BSC-BTS direction to activate a radio

channel.

22 ChannelActivation

Acknowledge

Sent in BTS-BSC direction to indicate re-quested radio channel activation has been

completed successfully.


Negative

Acknowledge

Sent in BTS-BSC direction to indicate thatthe requested radio channel could not be

performed.

24 Connection

Failure

Sent from BTS to BSC to indicate an active

connection has been broken.

25 DeactivateSACCH

Sent from BSC to BTS to deactivate theSACCH of an active channel.

26 Encryption

Command

Sent in BSC-BTS direction to start ciphering

mode operation

27 HandoverDetection

Sent in BTS-BSC direction when BTS detectsa Handover Access message from a MS on

the Handover activation channel.

28 MeasurementResult

Sent in BTS-BSC direction to report to BSCthe results of radio channel measurements

for a particular MS.

29 Mode ModifyRequest

Sent from BSC to BTS to request a change ofchannel mode of an active channel.

2A Mode Modify

Acknowledge

Sent from BTS to BSC to conrm the change

of channel mode of an active channel.

2B Mode ModifyNegative

Acknowledge

Sent from BTS to BSC to indicate the chan -nel mode modification could be performed.

2C PhysicalContext Re-

quest

Sent from BSC to BTS to request the “physi-cal context” of an active channel.

Dedicated Channel Message Types table continues...


HexCode

Msg Type Meaning

2D Physical

ContextConfirm

Sent from BTS to BSC as a response to #44;

contains “physical context” info.

2E RF Channel

Release

Sent from BSC to BTS to inform that a radio

channel is no longer needed.

2F MS PowerControl

Sent from BSC to BTS to change the MSpower level of the parameters used by the

TRX to control the MS power.

30 BS PowerControl

Sent from BSC to BTS to change the TRXtransmission power level of the parameters

used by the TRX to control its transmissionpower.

31 Preprocess

Configure

Sent from BSC to BTS to modify the prepro -

cessing parameters used by the BTS.

32 Preprocessed Measurement

Result

Used by BTS to report the results of radioparameter preprocessing.

HexCode

Msg Type Meaning

33 RF Channel

ReleaseAcknowledge

Sent from BTS to BSC as an acknowledge-

ment to a RF Channel release message.

34 SACCH Info Modify.

35 Talker Detection.

36 Listener Detection.


Sent in BSC-BTS direction to activate a radiochannel.

22 Channel

ActivationAcknowledge

Sent in BTS-BSC direction to indicate re-

quested radio channel activation has beencompleted successfully.

Table 4 Dedicated Channel Message Types

CHANNEL #

Options: ALL (F1), 00 to 1F

This filter corresponds to the last 5 bits of the 2nd octet of the

channel number information element. It allows for capturing mes-

sages with a specic physical channel/subchannel number.

17SSMTT-27M2

TIMESLOT

Options: ALL (F1), 0 to 7

Capture messages using a specic timeslot number. It corre-

sponds to the first three bits of the second octet of the channel

number information element.

IMSI

Options: ALL (F1), any up to ten digit number

Choose whether to lter for messages containing the International

Mobile Subscriber Identity information.

1.3.2.2 Capture Traces

Use the CAPTURE TRACES

screen to observe the live

transfer of messages, on Line 1

and/or 2. Confirm that the test

set is properly configured for

RX-1 and RX-2, Bridge or

Monitor mode, before attempt-

ing. See Section 1.3.1.

If monitoring Line 1, all of the

trace messages will be for L1. If

monitoring both sides of a line,

messages will be shown for L1

and L2, on separate screens.

Figure 8 A-bis Capture

Traces Screen

CAPTURE TRACES F-keys

STOP/START (F1): Begin or halt the tracing process. When live

capturing has been stopped, new F-keys are available:

DECODE/HEX (F2): Select the display format of the data. The

message is shown in hex format on the sample screen.

FILTER (F3): View the FILTER SETUP screen, as shown in

Figure 7.

Note: The test set automatically saves the last Capture Trace

session. The session is lost if you escape out of the PROTOCOL

ANALYSIS menu or start a new session.

To save the current session, press ESC once, and then select

VIEW/PRINT/SAVE TRACES. The test set must have second

memory card installed in order to save the CURRENT trace. See

Section 1.2.3-Saving a Trace for further details.


1.3.3 View/Print/Save Traces

The screens shown in Figure 9 present a list of any previously

stored traces and the current unsaved trace. The available F-keys

are dependent on the cursor position.

If on CURRENT (unnumbered position) the F-keys are as shown

in the screen on the left in Figure 9. If any of the saved traces are

selected (1-10) then the F-keys are as shown on the right.

Notes

• These screens are displayed only if a memory card is installed

in the outer slot of the test set.

• If their are no traces in the CURRENT row, then no F-keys will

be available.

Figure 9 View/Print/Save Traces Screens

Viewing a Saved Trace

1. In the VIEW/PRINT/SAVE

TRACES screen, select a

trace to view and press

VIEW (F1). The VIEW screen

then shows the label of the

saved trace (AAA) and the

number of saved messages

(TOTAL MSG).

Filt 11:30:30

VIEW AAA

TOTAL MSG = 1780

FROM MSG : 1

TO MSG : 1780

VIEW PRINT EDIT FILTER

Figure 10 View Screen

2. Press VIEW (F1) in the View screen to view the saved trace.

Note that if a Filter is on, the messages will be ltered before

they are presented. Figure 11 shows sample screens.

19SSMTT-27M2

Figure 11 View Trace Sample Screens


L1/2: Line the message was received on.

Date and Time of the message are also shown on the rst line,

as is the # (message number).

N(R): Receive Sequence number of this message

N(S): Send Sequence number of this message

SAPI: Service Access Point Identier number

TEI: Terminal Endpoint Identier number

LYR2 TYPE: Layer 2 message type (Supervisory, Unnumbered

Format, Information)

LYR3 DISC: Layer 3 Message Discriminator value

LYR3 TYPE: Layer 3 message type

VIEW TEST F-keys

PREV (F1) and NEXT (F2): Use to page through the messages.

DECODE/HEX (F3): Use to change the display of the informa-

tion.


Printing a Saved Trace

1. Connect a SunSet printer to

the test set’s serial port.

2. From the VIEW/PRINT/SAVE

TRACES screen, select a

trace, then press PRINT (F3).

3. In the PRINT TEST screen,

select the messages to be

printed using the FROM

MSG and TO MSG lines.

Filt 11:30:30

PRINT TEST AAA

TOTAL MSG = 177

FROM MSG : 50

TO MSG : 177

FORMAT : DECODE

press ENTER to print

HEX DECODED BOTH

Figure 12 Print Test Screen

4. At the FORMAT line select the printing format; HEX (F1),

DECODE (F2) , or BOTH (F3)

5 Press ENTER after making the selections, and the results will

be sent to the serial port for printing.

• If a printer is not connected, or improperly congured, “PRINTER

NOT READY” is displayed.

• See the test set’s User’s Manual for information on conguring

the serial port for printing.

Deleting a Trace

1. Select the trace to delete in VIEW/PRINT/SAVE TRACES.

2. Press DELETE (F2). At the message “TRACE WILL BE DE-

LETED”, press ENTER to continue or ESC to escape.

Saving a Trace

1. In the VIEW/PRINT/SAVE

TRACES screen with

CURRENT selected, press

SAVE (F4) and refer to the

screen on the right.

2. At this point the cursor is on

the first position of the

LABEL line, and the follow-

ing F-keys are available:

Filt 11:30:30

SAVE TRACES

LABEL :

FROM : 1

TO : 500

TOTAL = 500

A B C D E F G

H I J K L M N

O P Q R S T U

V W X Y Z - /

INSERT DELETE TOGGLE

Figure 13 Save TracesScreen

INSERT (F1): Use to insert a character

DELETE (F2): Use to remove character(s)

TOGGLE (F3): Use to access characters

: Use to position the cursor

3. Press TOGGLE (F3) to access the character grid. The “A” will

be selected.

21SSMTT-27M2

4. Use to select a character, then press SELECT

(F4). The character is then inserted into the LABEL line at the

cursor point. Repeat until finished.

• To enter numbers, press SHIFT and use the numeric key-

pad.

• If a mistake is made, press TOGGLE (F3) and move the cursor

to the incorrect character and press:

- DELETE (F2): Use to remove character(s)

- INSERT (F1): Use to insert a character(s)

Press TOGGLE (F3) to reenter the character grid and continue

with the LABEL.

5. When nished, press TOGGLE (F3) and then ENTER. The

record with it’s new name is then shown in VIEW/PRINT/SAVE/

TRACES.

If no space is available “VIEW/PRINT/SAVE/TRACES Full” is

displayed. A stored trace must be deleted in order to save a

new one.

Editing a Trace

1. The LABEL of a saved trace can be edited and the number of

the traces saved.

2. From the VIEW/PRINT/SAVE TRACES screen, select a saved

trace to edit, then press EDIT (F3). An EDIT TRACES screen

is displayed like the one shown in Figure 14.

Figure 14 Edit Traces Screen

3. This EDIT TRACES screen is similar to the one shown in Figure

13, but also gives the total number of messages saved in the

trace. To edit a saved trace follow the procedure in Saving a

Current Trace, steps 2-4 .


1.4 GPRS Statistics

The General Packet Radio Service Statistics feature enhances

the measurement capabilities for confirming the performance of a

GPRS network, including GPRS over GSM Abis. GPRS Analysis

conforms to ETSI Recommendations for GSM Phase 2+GSM

04.08,GSM 08.56, and GSM 08.58.

In order to use the GPRS functions, set the E1 module’s Test

Conguration L1-Rx and L2-Rx to Bridge or Monitor.

The GPRS Abis menu screen contains the following:

• CONFIGURATION

• GPRS Abis STATISTICS

• VIEW/PRINT RESULTS (see VIEW/STORE/PRINT in the

SSMTT-27 User’s Manual .

1.4.1 GPRS Configuration

11:30:30

GPRE Abis CONFIGURATION

VENDOR : NOKIA

FORMAT : PCU

TIMESLOT : 1

SUB-CHANNEL : 1

LYR2 CTRL FIELD : N/A

NOKIA ERICSON SIEMENS NORTEL

Figure 15 GPRS A-bis Configuration Screen


VENDOR

Options: NOKIA (F1), ERICSON (F2), SIEMENS (F3), NORTEL

(F4)

Results will be presented according to the specications used

by the vendor.

FORMAT

Options: SIGNAL (F1), PCU (F2)

Determine the format used.

• SIGNAL: Select to monitor the A-bis signalling channel.

• PCU: Select Packet Control Unit to monitor the PCU channel

23SSMTT-27M2

(GPRS data channel).

SIGNALLING T/S

Options: 1-31

Specify the received timeslot by pressing PREV (F1) or NEXT

(F2).

SUB-CHANNEL

Options: 1-4, ALL (SIGNAL Format only)

If using a 16K rate, select a receive subchannel from 1-4 by

pressing PREV (F1) or NEXT (F2), or press ALL (F3) to use a 4

subchannels. Press ALL (F3) to monitor a 64K A-bis signalling

channel.

LYR2 CTRL FIELD (SIGNAL only)

Options: MOD8 (F1), MOD128 (F2)

Select the Layer 2 control field.

• MOD8 is Modulo 8 sequence numbering.

• MOD128 is Modulo 128 sequence numbering, the ETSI speci-

fied method.

When nished, press ESC.


1.4.2 GPRS A-bis Statistics

Upon entering this screen, the test set starts monitoring GPRS

on the GSM A-bis link. A “Connect Line 1 to Uplink, Connect Line

2 to Downlink” message is displayed before the results screens

appear.

Result Screen F-keys.

PAGE-UP (F1)/ PAGE-DN (F2): Page through the screens.

STOP/START (F3): Stop and restart the measurement.

PRINT (F4): Send the results to the serial por t for printing.

To save results, press ESC and the results are saved as a CSV

file. See the test set’s chassis User’s Manual for details.

Figures 16 and 17 present sample Statistics screens. The statistics

gathered will depend on the VENDOR and FORMAT selected in

the GPRS Abis CONFIGURATION screen. See the vendor speci-

cations for the expected message requirements and definitions.

Summary Screen

This screen summarizes the GPRS setup and layer results.

Meas 11:30:30

GPRS Abis SUMMARY

VENDOR : NOKIA

FORMAT : PCU

TIMESLOT : 1

SUB-CHANNEL : 1

LYR2 CTRL FIELD : N/A

GPRS LAYER DETECTION: PASS

PAGE-UP PAGE-DN STOP PRINT

Figure 16 GPRS Statistics Summary Screen

Press PAGE-DN (F2) to view the next set of screens:

A-bis Statistics Screens

These GPRE Abis STATISTICS screens show GPRS statistics

monitored on the A-bis link.

25SSMTT-27M2

Meas 11:30:30


GPRS CH MANAGEMENT LINE 1 LINE2

P-IMMED ASSIGN CCCH:0 0

P-IMMED ASSIGN ACK :0 0

P-IMMED ASSIGN NACK:0 0

P CHANNEL REQUIRED :0 0

PS-PAGING COMMAND :0 0

PS-QUEING COMMAND :0 0

PS-POLLING COMMAND :0 0

PS-DELETE COMMAND :0 0

PS-DELETE RESPONSE :0 0


GPRS Statistics, Nokia Signalling Channel

Meas 11:30:30


LINE 1 LINE2

CHANNEL ACTIVATION :0 0

INITIAL ACTIVATION :0 0

REACTIVATION CCCH :N/A 0

IMMED ASSIGNMENT :N/A 0

NORMAL ASSIGNMENT :0 0

ASYNC HANDOVER :N/A 0

SYNC HANDOVER :N/A 0

ADDITION ASSIGN :0 0

MULTISLOT CONFIG :0 0

CHANNEL ACTIV ACK :0 0

CHANNEL ACTIV NAC :0 0


GPRS Statistics, Ericsson Signalling Channel

Meas 11:30:30


UP-LK DN-LK

PCU SYNC FRAME :0 0

PCU EXTD DATA FRAME:0 0

SPEACH FRAME :0 0

DATA FRAME :0 0

EXTENDED DATA FRAME:0 0

O&M FRAME :0 0

IDLE SPEECH FRAME :0 0


GPRS Statistics 1, Nokia PCU Channel

Meas 11:30:30


UP-LK DN-LK

CCU-SYNC-IND :0 0

PCU-SYNC-IND :0 0

CCU-DATA-IND :0 0

PCU-DATA-IND :0 0

SPEACH FRAME :0 0

DATA FRAME :0 0

O&M FRAME :0 0

IDLE SPEECH FRAME :0 0


GPRS Statistics 1, Ericsson PCU Channel

Meas 11:30:30


UP-LK DN-LK

PCU SYNC FRAME :0 0

TIME ALIGN CHANGE :0 0

TIME ALIGN DISABLE :N/A 0

UPLINK FRAME ERROR :N/A 0

FRAME NUMBER :0 0

FN STATUS VALID :N/A 0

FN STATUS NOT VALID:N/A 0

FN STATUS CHANGE :0 0

FN OFFSET : N/A



Meas 11:30:30


UP-LK DN-LK

CCU SYNC FRAME :0 N/A

TIME ADJUST CHANGE :0 N/A

DNLINK FRAME ERROR :0 N/A

DNLINK BLOCK ERROR :0 N/A

PCU SYNC FRAME :N/A 0

TIME ADJUST CHANGE :N/A 0




Meas 11:30:30


UP-LK DN-LK

PCU EXTD DATA FRAME:0 0


TIME ALIGN CHANGE :0 0

TIME ALIGN DISABLE :N/A 0

IDLE DATA FRAME :0 0

CODING CS-1 :0 0

CODING CS-2 :0 0

CODING ACCESS MODE :0 0

T2 BLOCK ALIGNMENT :0 0



Meas 11:30:30


UP-LK DN-LK

CCU DATA FRAME :0 N/A

TIME ADJUST CHANGE :0 N/A

DNLINK FRAME ERROR :0 N/A

PARITY ERROR (ES) :0 N/A

PCU DATA FRAME :N/A 0

TIME ADJUST CHANGE :N/A 0




Figure 17 GPRS Statistics Screens


1.5 TRAU Testing

The GSM TRAU screen allows transmission of a prerecorded

speech message on Line 1. It allows observation of received C-

bits, and runs a 16K BERT on a data transmission.

Figure 18 GSM TRAU Screen


TS/SC

Select the Timeslot (1—31) and Subchannel (1—4) to transmit

on by using NEXT (F1) and PREVIUS (F2).

TYPE

Determine the type of message to transmit by pressing SELECT

(F1) to enter the SELECT TYPE screen, which contains a the

following list of messages:

• SP-FR: Speech, Full Rate

• SP-EFR: Speech, Enhanced Full Rate

• SP-1010: Speech identied within 1010 pattern transmission

• 511: 511 test pattern

• IDLE SP: Speech identied within Idle code transmission

• 2e15: Pseudo random bit sequence pattern; 15-stage register

• 2e11: Pseudo random bit sequence pattern; 11-stage register

• 1111: All ones test pattern

• 1010: Alternating ones and zeros test pattern

• 0000: All zeros test pattern

In the screen, select the desired message, then press ENTER to

return to the TRAU configuration screen.

If a data test pattern is selected for TYPE, the 16K BERT screen

is displayed, ready to start testing.

27SSMTT-27M2

Figure 19 16K TRAU BERT Screen

When ready, press START (F3). The following are reported:

ET: Elapsed Time since START was pressed.

BIT: Bit errors count.

RATE: The rate at which errors are being received.

ES: Errored Seconds count.

EFS: Error Free Seconds count.

SES: Severely Errored Second count with an error rate of 10 -3

or higher.

UAS: Unavailable Seconds count; UAS begins at the onset of 10

consecutive SESs, or at loss of signal or loss of frame.

LOSS: Loss of Signal Seconds count during which signal was

lost.

GSM TRAU F-keys

STOP / START (F3): Stop and restart measurements.

PRINT (F4): Send the results to the serial port.

If a speech selection was made in TYPE, continue conguring:

LINK DIR

Options: UPLINK (F1), DNLINK (F2)

Select the link direction to transmit. See Figure 20.

Figure 20 Uplink/Downlink Directions


IDLE CODE

Set the idle code inserted on the non-selected channels by press-

ing SHIFT and using the numeric keys to enter the digits. Use the

arrow keys to move between digits as required.

TIME ALIGN

The default is no delay, “No Change” to the voice signal.

Change the delay time by pressing INC+1 (F1) DEC-1 (F2) or

to change the delay by steps of 500 ms. Press INC+10 (F3) to

increment delay by steps of 10 x 500 ms.

When ready, press START and observe the results:

RESULTS

Observe the received C-bits at the Rx-1 line.

29SSMTT-27M2

2 Applications

2.1 A-bis Monitoring

Monitor both directions of A-bis signalling to get a complete picture

of the state of the line.

1. From the module’s main menu, select TEST CONFIGURATION

and congure as follows: TEST MODE: E1DUAL

Tx/INSERT: L1-TX RX/DROP: L1-RX

TxSOURCE: TESTPAT FRAMING: PCM-31 CRC-4: as required

TEST RATE: 2.048M L1-Rx Port: BRIDGE

L2-Rx Port: BRIDGE

TX CLOCK: RECEIVE

LED SOURCE: as required.

When nished, press ENTER.

2. Select from the module main menu, PROTOCOLS > GSM

ANALYSIS > PROTOCOL ANALYSIS > CONFIGURATION

and congure as follows:

RATE: 64K CRC-4: OFF SIGNALLING T/S: 16

SUB-CHANNEL: N/A L1-Rx: BRIDGE

L2-Rx: BRIDGE

SAPI/TEI FORMAT: DECIMAL

LYR CTRL FIELD: MOD128

When nished, press ENTER.

4. Connect the test set as shown in Figure 21:

Figure 21 A-bis Monitoring Setup


5. Press HISTORY to turn off any blinking LEDs.

6. From GSM Abis ANALYSIS,

select PROTOCOL ANALY-

SIS > CAPTURE TRACES

and observe the live passage

of traces in both directions.

In this CAPTURE TRACES

screen, “...” indicates more

results. To view, press

PAGE-DN (more, F2).Figure 22 A-bis MonitorTraces Screen

7. Press FILTER (F3) to apply lters to the captured messages

in the screen, as shown in Figure 23.

Figure 23 Filter Setup Screen

A. Configure the filters as desired.

B. When nished, press ENTER to return to the CAPTURE

TRACES screen. Traces will now be captured according

to the FILTER settings. “Filt” will be displayed.

8. Press STOP (F1) to halt the capturing of live data. Then use

the PAGE-UP (F1) and PAGE-DN (F2) to view through the

trace. Press SAVE (more, F3) to save the trace in the SAVE

TRACES screen. The trace can be given a label to be saved

under in the VIEW/PRINT/SAVE TRACES screen. SeeSection

1.3.3-Saving a Trace .

31SSMTT-27M2

3 Reference

3.1 GSM Technology Overview

GSM, Global System for Mobile communication, is governed by

ETSI transmission standards. GSM technology uses a digital

standard for voice and data applications. Figure 24 shows the

different parts of a GSM network.

Figure 24 GSM Network Overview

The three major components of a GSM network are the MS (Mo -

bile Station), BSS (Base Station Subsystem), and the Network

Subsystem. This GSM network is then connected to a xed net-

work like the PSTN (Public Switched Telephone Network).

A MS consists of a ME (Mobile Equipment) and a SIM (Subscriber

Identity Module). The SIM is a card that identies the subscriber to

the GSM network. It also authenticates and encrypts a subscriber’s

voice, identied by the IMSI (International Mobile Subscriber

Identity). Once a SIM card is inserted to a GSM terminal, or ME, it


becomes a MS. Like the SIM, the ME can also be identied using

the IMEI (International Mobile Equipment Identity).

While a subscriber roams or is stationary, the MS transmits a radio

signal to one of the many BTS (Base Transceiver Station). These

rugged, compact BTS cells are equipped with radio transceivers

to send and receive signals using a radio-link protocol via a Um

interface.

The BTSs are in turn managed by a BSC (Base Station Controller).

Using the A-bis interface, the BSC handles radio-channel setup,

frequency hopping for security measures, and handovers. In some

instances a TRAU (Transcoder Rate Adaption Unit) is placed at a

BTS to perform transcoding between 64 kbit/s A-law speech and

13 kbit/s RPELTP speech. The TRAU may also be located at or in

conjunction with the BSC. The BSC then connects the MS to the

MSC (Mobile Switching Center) using the A-interface.

Using four registers, the MSC handles subscriber registration,

authentication, location updates, handovers, and call roaming.

The HLR (Home Location Register) is the central database for

all subscribers holding identity of the subscriber, services acces-

sible to the subscriber, and current location of the MS. Given a

MSISDN (Mobile Subscriber ISDN) number, a call can be routed

by looking up the corresponding IMSI found in the HLR.

The VLR (Visitor’s Location Register) contains information about

all Mobile Stations within the area served by the MSC. Informa-

tion such as MS identity, the area in which it was last registered,

additional information pertaining to the subscriber, and any

supplementary services available are found in the VLR.

An MSC refers to the VLR each time a MS receives or makes a

call. A security register called the AUC (Authentication Centre)

validates a SIM and performs a mathematical calculation on the

same secret information stored in SIM. Another security register

is the EIR (Equipment Identity Register). Using a list of three

categories, the EIR ensures that all ME’s being used are valid

and authorized to function on the PLMN (Public Land Mobile

Network). Together, the MSC, HLR, VLR, AUC, and EIR make

up the Network Subsystem that connects the GSM network to a

xed network.

33SSMTT-27M2

3.2 GSM Radio Transmission

At the physical layer, MSs and BSSs use a combination of FDMA

(Frequency-Division Multiple Access ) and TDMA (Time-Division

Multiple Access ) to send information. The 890—915 Mhz range is

used for uplink transmission from MS to BSS and the 935—960

Mhz range for downlink from BSS to MS transmission.

Each 25 MHz bandwidth is divided into 124 carrier frequencies

spaced 200 kHz with one or more carrier frequency allocated to

each base station. A GSM Trafc Channel TCH multiframe com -

prises of 26 TDMA frames, as shown in Figure 25.

Figure 25 GSM Framing

TCHs (Trafc Channels) are used to carry speech and data,

represent frames 0-11 and 13-24. Frame 12 is occupied by the

SACCH (Slow Associated Control Channel) used for radio-signal

measurement. Frame 25 is set to idle.

Each TDMA frame consists of eight BP (Burst Periods) lasting

approximately 0.577 ms. A normal burst consists of two 57 bits of

information, 26 bits Training Sequence for equalization, 1 stealing

bit for each information block used for the FACCH (Fast Associ-

ated Control Channel) for handover purposes, 3 tail bits at each

end, and an 8.25 bit guard sequence.


In addition to TCHs, there are CCH (Control Channels) framed in

a 51 TDMA format. The following table lists the different types of

CCH or common control channels and their functions.

Broadcast

Control Channel

(BCCH)

Downlinks information, e.g. base station iden-

tification, frequency allocation and frequency

hopping sequences.

Frequency Cor-

rection Channel(FCCH)

Synchronizes TS structure

Synchronization

Channel (SCH)

Synchronizes TS structure

Random Access

Channel (RACH)

Uplinks requests for access to GSM network

Paging Channel

(PCH)

Downlinks alert signal to MS for use

Access Grant

Channel (AGCH)

Downlinks access to use network using a stand-

alone Dedicated Control Channel (SDCHH)

Table 5 CCH Functions

3.3 GSM Protocol

The GSM signalling protocol uses a combination of GSM, modified

ISDN, and SS7 standards between the Um Abis, and A interfaces.

Figure 26 shows the different standards that govern the physical,

data link, and network layers of GSM.

Figure 26 GSM Signalling Protocol

As seen, TDMA frames are sent at the physical layer between

the Mobile Station and the Base Transceiver Station via the Um

interface. At the Data Link Layer, a modied version of LAPD-m

35SSMTT-27M2

(Link Access Protocol-D channel) is used. Layer 3 GSM Signal-

ling protocol includes the CM (Call Management), MM (Mobility

Management), and RR (Radio Resource Management). A table

of these protocols and functions is shown as follows:

Call Management

(CM)

Handles Call Control (CC), Supplementary Ser-

vices, and Short Message Services (SMS)

Mobility Manage-

ment (MM)

Manages roaming update, registration, security,

and authorization

Radio Resources

(RR)

Controls setup, maintenance, and termination of

radio & fixed channels

Table 6 Layer 3 Protocols

The GSM signalling protocols, CM, MM, and RR, are passed

through the BTS transparently and via the A-bis interface. How-

ever, in some cases, RR messages are mapped directly to the

BTSM (BTS Management) protocol which handles major BTS

functions, such as paging.

At the A-bis interface, the LAPD-m is used for transferring signal-

ling through the data link. The BSC uses the BTSM protocol and

RR to control signals. RR then gets mapped to the BSSMAP (BSS

Management Application Part).

Again at Layer 3, CM and MM pass transparently through the BSC

with the BSC using the DTAP (Direct Transfer Application Part) to

transfer both the CM and MM via the A interface.

Sending information through the A interface, the BSC uses the

MTP (Message Transfer Part) and the SCCP (Signalling Con-

nection Control Part) of SS7 (Signalling System 7). On top of the

SCCP are the BSSMAP, MM, and CM.

Between MSCs, the MTP of SS7 sends both ISUP and TUP

messages dealing with circuit related information. Also, the MTP,

SCCP, TCAP (Transaction Capability Application Part) are used

by the SS7 MP (Mobile Application Part) that transfer information

such as authentication, location, security, and handover proce-

dures for an MSC.


3.4 TRAU Frames

Figure 27 16 kbit TRAU Frame

The 64 kbit/s timeslots are divided into four 16 kbit/s subchannels.

Each devotes 13 kbit/s to voice, with 3 kbit/s remaining for spare

bits. A TRAU does the required transcoding between the 64 kbit/s

and 16 kbit/s channels. A TRAU may be located at the BTS, BSC

or MSC. If located outside the BTS, the TRAU can be controlled

by in-band signalling, using some of the spare bits.

A TRAU frame, containing 320 bits, is used to send signals be-

tween the BSC and the TRAU. Its use is mandatory when the A-bis

interface is applied. See Figure 27. The specific C-bit coding for

speech frames is shown in the following table:

37SSMTT-27M2

Bit Uplink Downlink

C1-C5 (FR)

(EFR)

00010 (speech)

11010 (speech)

11100

11010

C6-C11

(Time Align)

000000 No change

000001 1x500 µs delay

000010 2x500 µs delay

100111 39x500 µs delay

101000 Not used

111101 Not used

111110 1x250µs delay

111111 250µs advance

C12-16

(Frame Indicator)

C12 0: BFI=0

1: BFI=1

Spare

Spare

C13 & C14

(DTX Indicator)

C13 0

C14 0

Spare

C13 0

C14 0

SID=0 C12-C15 Spare

C13 0

C14 1

SID=1 IF FR, Speech

ELSE

C12: UFE

C13 1

C14 0

SID=2 0: UFE=0 baduplink

1: UFE=1 gooduplink

C15 0 TAF=0

1 TAF=0

C13-C15 Spare

C16 Spare 0 SP=0

1 SP=1

C17

(DTX Indicator)

0 DTX=no

1 DTX=yes

Spare

C18-C21 Spare Spare

Key

BFI Bad Frame Indicator

DTX Discontinuous Transmission

SID Silence Descriptor

SP Speech Indicator

TAF Time Alignment Flag

Table 7 TRAU Speech C-bit Coding


3.5 GPRS

GPRS (General Packet Radio Service) is known as the 2.5

Generation wireless system. It is also known as GSM-IP. GPRS

deploys Packet Switched Technology in order to deliver bursty

data over an existing GSM or Frame Relay networks. Users are

always on-line, and may make voice and data calls at the same

time (depending on the phone).

In theory, the data rate of a GPRS phone is up to 171.2 kbit/s over

GSM 8 timeslots. In practice, many mobiles share the bandwidth

and the GPRS phase 1 mobile will support only two or three

timeslots on the air interface. The initial data rate in GPRS phase 1

is expected at 28 kbit/s. Figure 28 gives an overview of the GPRS

network and testing.

BTS

Voice Quality Testing,A-bis Monitoring,GPRS over A-bisMonitoring

GPRS overFrame RelayMonitoring

Voice Quality TestingSS7 Monitoring

SS7Monitoring

2 Mbit/s Transmission Testing

A-bisA/A-ter

BTS

Internet

PSTN

Gs-BSSAP+

Gi-Ethernet 100TCP/IP, UDP

GGSNSGSN

B . . . G

Gr-MAP

Gd-MAP

. . .

VLR

AuC

HLR

SMSGMSC

BSC

MSC

SGSN

Gb

Gp-Ethernet100TCP/IP, UDPGTP 09.60

Figure 28 GPRS Network Overview

39SSMTT-27M2

There are two main GPRS elements over the GSM network,

SGSN and GGSN.

Servicing GPRS Support Node (SGSN)

SGSN controls all aspects of connection between the network

and Mobile Station by providing:

• Session Management

• Authentication and Mobility Management: handover

• Connect to VLR (Visitor’s Location Register ) using Gs based

on BSSAP+ (Base Station Subsystem Application Part)

Gateway GPRS Support Node (GGSN)

GGSN provides the following functions:

• Counts the number of packets for billing purposes.

• Gateway to PDN (Public Data Network): authentication and

location management function

• Firewall

Packet Control Unit (PCU)

The PCU is located at the Base Station Controller (BSC) to convert

packet data into a radio format that can be transmitted.

• Radio Resource Management

• Quality of Service (throughput, delay, reliability, priority)

Packet Data Protocol (PDP)

PDP opens a session for a mobile to request a temporary IP ad-

dress (supporting IPv4 32-bit addressing).

GPRS Gb Protocol Stack

Layer 1: Frame Relay Forum FRF 1.1

Layer 2: Network Service

Layer 3: BSSGP (Base Station System GPRS Protocol)

Layer 4, 5: LLC (Logical Link Control)

Layer 7: SNDCP (Subnetwork Dependent Convergence Proto-

col)


41SSMTT-27M2

4 General Information

4.1 Testing and Calibration Statement

Sunrise Telecom certies that this product was manufactured,

tested, and verified according to the applicable Sunrise Telecom

Incorporated manufacturing and test procedure(s). These formal

procedures are designed to assure that the product meets its

required specifications.

This product has no user-adjustable settings. During normal usage,

periodic calibration is not a requirement. However, if the product

fails during the self-verication test, during power up, the product

can be returned to the manufacturer for evaluation and repair.

4.2 Offices

Sunrise Telecom ofces are located around the world:

• SUNRISE TELECOM INCORPORATED

302 Enzo Drive San Jose, CA 95138 U.S.A.

Tel: 1-800-701-5208 Fax: 1-408-363-8313

Internet: http://www.sunrisetelecom.com

E-mail: [email protected]

• SUNRISE TELECOM ATLANTA

3075 Northwoods Circle, Norcross, GA 30071, USA

Tel: 770-446-6086, Fax: 770-446-6850

[email protected]

• SUNRISE TELECOM CHINA

Room 1503, Tower 3 , No.1, Xizhimenwai Street

Xicheng District, Beijing, 100044, CHINA

Tel: +86-10-5830-2220, Fax: +86-10-5830-2239

[email protected]

• SUNRISE TELECOM FRANCE SAS

ZA Courtaboeuf 2 - Immeuble le Ceylan

6 Allée de Londres 91140 Villejust, FRANCE

Tel: +33 (0) 1 6993 8990, Fax: +33 (0) 1 6993 8991

[email protected]

• SUNRISE TELECOM GERMANY

Grabenstrasse 1, 72116 Mössingen GERMANY

Tel: +49 7473 378 2400 Fax: +49 (0) 7473 378 2424

[email protected]


• SUNRISE TELECOM TAIWAN

21, Wu Chuan 3rd Road, Wu-Ku Hsiang

Taipei County, 248, Taiwan, R.O.C.

Tel: +886-2-5578-0788, Fax: +886-2-2298-2575

43SSMTT-27M2

4.3 Express Limited Warranty

This Sunrise Telecom product is warranted against defects in

materials and workmanship during its warranty period. The war-

ranty period for this product is contained in the warranty page on

http://www.sunrisetelecom.com.

Sunrise Telecom agrees to repair or replace any assembly or

component found to be defective under normal use during this

period. The obligation under this warranty is limited solely to re-

pairing or replacing the product that proves to be defective within

the scope of the warranty when returned to the factory. This war -

ranty does not apply under certain conditions, as set forth on the

warranty page on http://www.sunrisetelecom.com.

Please refer to the website for specic details.

THIS IS A LIMITED WARRANTY AND THE ONLY WARRANTY

MADE BY SUNRISE TELECOM. SUNRISE TELECOM MAKES

NO OTHER WARRANTY, REPR SENTATION OR CONDITION,

EXPRESS OR IMPLIED, AND EXPRESSLY DISCLAIMS THE

IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS

FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT

OF THIRD PARTY RIGHTS..


45SSMTT-27M2

Index

Symbols

16 kbit TRAU Frame; 3616K TRAU BERT Screen

BIT; 27EFS; 27

ES; 27ET; 27LOSS; 27

RATE; 27SES; 27

UAS; 27

A

A-bis Capture Traces Screen; 17A-bis Filter Setup Screen

CHANNEL #; 16FILTER STATUS; 12IMSI; 17

LAYER 1; 12LAYER 2; 12

LAYER 3; 13MSG DISC; 13

MSG TYPE; 13SAPI; 12

TEI; 13TIMESLOT; 17

Abis/A-ter GSM Monitor Screens

-; 7A; 7

Abis; 7D; 7

Extended Data; 7FASW; 7I; 7

M; 7P; 7

S; 7A GSM Monitor Screens; 9

A GSM Voice Decoding Screens; 9Applications

A-bis Monitoring; 29


CCautions; 2

CCH Functions; 34Common Channel Message Types; 14

DDedicated Channel Message Types; 16

FFigures

01 GSM Analysis Menu; 502 Abis/A-ter GSM Monitor Screens; 6

03 Abis/A-ter GSM Voice Decoding Screens; 704 A GSM Monitor Screens; 905 A GSM Voice Decoding Screens; 9

06 GSM Abis Conguration Screen; 1007 A-bis Filter Setup Screen; 12

08 A-bis Capture Traces Screen; 1709 View/Print/Save Traces Screen; 18

10 View Screen; 1811 View Trace Sample Screens; 1912 Print Test Screen; 20

13 Save Traces Screen; 2014 Edit Traces Screen; 21

15 GPRS A-bis Conguration Screen; 2216 GPRS Statistics Summary Screen; 24

17 GPRS Statistics Screens; 2518 GSM TRAU Screen; 2619 16K TRAU BERT Screen; 27

20 Uplink/Downlink Directions; 2721 A-bis Monitoring Setup; 29

22 Sample A-bis Monitor Traces Screen; 3023 Filter Setup Screen; 30

24 GSM Network Overview; 3125 GSM Framing; 3326 GSM Signalling Protocol; 34

27 16 kbit TRAU Frame; 3628 GPRS Network Overview; 38

GGPRS A-bis Configuration Screen

FORMATSIGNAL or PCU; 22

LYR2 CTRL FIELDMOD8 or MOD128; 23

SIGNALLING T/S; 23

47SSMTT-27M2

SUB-CHANNEL; 23

VENDOR; 22GPRS Network Overview; 38GPRS Statistics Screens; 25

GPRS Statistics Summary Screen; 24GRPS Abis Statistics

Abis Statistics Screens; 25Summary Screen; 24

GSM Abis Configuration ScreenCRC-4; 10L1-RX/L2-RX

TERM, BRIDGE, or MONITOR; 10LYR2 CTRL FIELD

MOD8 or MOD128; 11RATE; 10

SAPI /TEI FORMAT; 11SIGNALLING T/S; 10

SUBCHANNEL; 10GSM Framing; 33GSM Network Overview; 31

GSM Signalling Protocol; 34

L

Layer 3 Protocols; 35

O

Ofces; 41

R

Radio Link Layer Message Types; 14

T

Tables01 Radio Link Layer Message Types; 14

02 Common Channel Message Types; 1403 TRX Message Types; 1504 Dedicated Channel Message Types; 16

05 CCH Functions; 3406 Layer 3 Protocols; 35

07 TRAU Speech C-bit Coding; 37TDMA; 33

TRAU ScreenIDLE CODE; 28LINK DIR; 27

TIME ALIGN; 28TS/SC; 26


TRAU Speech C-bit Coding; 37

TRAU TestingTYPE

SP-FR, SP-EFR, SP-1010, 411, IDLE SP, 2e15, 2e11,

1111, 1010, or 0000; 26TRX Message Types; 15

VView/Print/Save Traces

Deleting a Trace; 20Editing a Trace; 21

Printing a Saved Trace; 20Saving a Trace; 20Viewing a Saved Trace; 18

Voice Decoding Screens#BFI; 8

#DTX; 8C1—C21; 8

LINE 1/2 T/S; 8LVL; 8S/C; 8

TIME ALIGNT; 8UFE; 8

UP/DOWNLINK; 8

W

Warnings; 2Warranty; 43

Documents

MAN-22060-US004_C00_SSMTT-27M2_GSM_mmd