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Copyright © 2005 Marconi Corporation plc. All rights reserved
Circuit Emulation Service (CES)
ATM Switch
2 Copyright © 2005 Marconi Corporation plc. All rights reserved
Objectives
Explain Circuit Emulation Service (CES) Define the role of the Circuit Emulation (CEM) netmods and
port card Describe the features of the CEM netmods and port card Compare and contrast CAS and CCS signalling Explain structured and unstructured CES Explain DS3 and OC-3 channelization Create an unstructured CES instance Create a structured CES instance
3 Copyright © 2005 Marconi Corporation plc. All rights reserved
What is Circuit Emulation Service (CES)?
Network
PBX
PBX
DataMux
VideoMonitor
PBXVideo
SE-400
ASX-1000
Video
ES-3810
SE-400
4 Copyright © 2005 Marconi Corporation plc. All rights reserved
ATM Adaptation Layer 1 (AAL1)
Type Traffic Bit Rate Timing Payload Format
AAL1 Voice and Real-Time
Video
Constant Isochronous 47 bytes + 1 byte = 48 bytes(User Info) (Overhead)
5 Copyright © 2005 Marconi Corporation plc. All rights reserved
Cell Fill
Full ATM AAL1 Cell Fill (47 bytes)
10110101
CellHeader
Sequence Number CRC / Parity
1 x DS0 (64 Kbps) = 6 milliseconds (overhead = 11%)
Variable Payload 12 to 47 bytes
Payload Pad
10110101
CellHeader
Sequence Number CRC / Parity
1 x DS0 (64 Kbps) 12 byte payload
= 1.1 milliseconds (overhead = 77%)
Partial ATM AAL1 Cell Fill (12 bytes)
+
47 byte payload
6 Copyright © 2005 Marconi Corporation plc. All rights reserved
CES Hardware
ASX–4000/M
CES
4 ports OC-3
Channelization
SONET Network
TNX-210 TNX-1100
CES
1 port OC-3
Channelization
TDM Network
Customer Premise
CES
3 ports DS3
6 or 8 ports UTP
PBX
7 Copyright © 2005 Marconi Corporation plc. All rights reserved
Signalling
Channel Associated Signalling (CAS) In-band signalling that is required for structured service
Common Channel Signalling (CCS) Out-of-band signalling wherein one channel of a DS1 is used for the
signalling
8 Copyright © 2005 Marconi Corporation plc. All rights reserved
Interface Capacity and Service Types
DS1 Netmod Structured mode:
1 to 24 DS0s per port
Unstructured mode: Single DS1 per port
Channelized DS3 Netmod Structured mode:
1 to 672 DS0s per port
Unstructured mode: Single DS3 per port 28 DS1s per port
Channelized OC-3 Netmod/Port Card Structured mode:
1 to 2,016 DS0s per port
Unstructured mode: 3 DS3s per port 84 DS1s per port
Structured Service
Unstructured Service
9 Copyright © 2005 Marconi Corporation plc. All rights reserved
DS3 Channelization ExampleN
etm
od
Ch
an
ne
lize
dD
S3
po
rt
28 individual DS1s• Each DS1 could be structured or unstructured
1 unstructured DS3
or
A structured DS1 contains 24 DS0s
Structured DS1
10 Copyright © 2005 Marconi Corporation plc. All rights reserved
OC-3 Channelization ExampleN
etm
od
/Po
rt C
ard
Ch
an
ne
lize
dO
C-3
po
rt
STS-1
STS-1
STS-1 DS3
DS3
DS31 unstructured DS3
or
28 individual DS1s• Each DS1 could be structured or unstructured
A structured DS1 contains 24 DS0s
11 Copyright © 2005 Marconi Corporation plc. All rights reserved
Port Numbering
DS1 CES netmods use the same ForeThought port numbering format as cell netmods: 1A1
Ch DS3 CES netmods use a hybrid port numbering format to identify channelized interfaces on a physical port DSX3 interfaces = port: 2b1 DSX1 interfaces = port(DS1 channel in DS3): 2b1(1) DS0 interfaces = port(DS1 channel in DS3, DS0 in DS1): 2b1(1,1)
Ch OC-3 CES netmods/port cards use a hybrid port numbering format to identify channelized interfaces on a physical port DSX3 interfaces = port[SONET path]: 4C1[1]
DSX1 interfaces = port[SONET path](virtual tributary group, virtual tributary): 4C2[2]
(1,1)
DS0 interfaces = port[SONET path](virtual tributary group, virtual tributary, DS0): 4C3[3]
(1,2,3)
12 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES DS1 Netmod Configuration -1
ATM SWITCH:-> services ces
ATM SWITCH:services ces-> new ?
[[-ifindex] <integer>] CES Service Index
[-iatmif] <AtmIf> Input AtmIf
[-its] <text> Input Timeslots
[[-oatmif] <AtmIf>] Output AtmIf
[[-ots] <text>] Output Timeslots
[[-ovpi] <integer>] Output VPI
[[-ovci] <integer>] Output VCI
[[-srts] <cbrclockmode>] SRTS
[[-fupc] <UPC Index>] Forward UPC
[[-bupc] <UPC Index>] Backward UPC
[[-cas] <cas>] CAS
[[-partialfill] <integer>] Partial Fill
[[-reassCDVT] <integer>] Reass CDVT (us)
[[-bufsize] <integer>] Buf Size
:
ATM SWITCH:services ces->
13 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES DS1 Netmod Configuration -2
Normal Connection:
Dangling Connection:
ATM SWITCH:services ces-> new –iatmif 1a1 –its all –oatmif 1b4 –ovpi 0 –ovci 100
ATM SWITCH:services ces-> show
CES Input Output
Id State AtmIf TimeSlots VPI VCI Type AtmIf TimeSlots VPI VCI
1025 up 1A1 unstructured 0 129 pvc 1B4 N/A 0 100
ATM SWITCH:services ces-> new –iatmif 1a2 –its all
ATM SWITCH:services ces-> show
CES Input Output
Id State AtmIf TimeSlots VPI VCI Type AtmIf TimeSlots VPI VCI
1025 up 1A1 unstructured 0 129 pvc 1B4 N/A 0 100
1028 down 1A2 unstructured 0 130 N/A N/A N/A N/A N/A
14 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES DS1 Netmod Configuration -3
ATM SWITCH:-> connections upc show
Service Police
Index Category Scheme PCR SCR MBS MCR CDVT Name
0 UBR ubr1 default_ubr
1 CBR cbr1 4107 3000 ces_cbr4107
ATM SWITCH:-> services ces show -advanced
CES Map Map Service Clock Partial Max Integ. Reass
Index VPI VCI Type Mode Cas Fill Buf Period CDVT
1025 0 129 unstructured synch basic 47 6144 2500 2500
1028 0 130 unstructured synch basic 47 6144 2500 2500
ATM SWITCH:-> services ces statistics
CES Reass Header Pointer Buffer Buffer CellLoss
Id Cells Errors Reframes Lost Cells UnderFlows OverFlows Status
1025 0 0 0 0 0 0 noLoss
1028 0 0 0 0 0 0 noLoss
15 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES Ch DS3 Netmod Configuration -1
ATM SWITCH:-> services ces-v2
ATM SWITCH:services ces-v2-> new ?
[-icbrservice] <CbrServiceIf> Input CES Service Interface
[[-ocbrservice] <CbrServiceIf>] Output CES Service Interface
[[-oatmif] <AtmIf>] Output AtmIf
[[-ovpi] <integer>] Output VPI
[[-ovci] <integer>] Output VCI
[[-clockmode] <clockmode>] CBR Clock Mode (default: synchronous)
[[-cas] <cas>] CAS
[[-partialfill] <integer>] Partial Fill (default: 0)
[[-bufmaxsize] <integer>] Buffer Max Size (default: 2000)
[[-reasscdvt] <integer>] Reassembled CDVT (default: 500)
[[-integperiod] (1000..65535)] Integration Period (default: 2500)
[[-adminstatus] <ifadminstatus>] Admin Status (default: up)
[[-statsenable] <cesstatsenable>] CES Stats Enable
[[-tcmode <tcmode>] Trunk Condition Mode
[[-tcsignal] <Hex Integer>] <0..F> Trunk Condition Signal
[[-tcdata] <Hex Integer>] <0..FF> Trunk Condition Data
16 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES Ch DS3 Netmod Configuration -2Normal Connection:
Dangling Connection:
ATM SWITCH:services ces-v2-> new –icbrservice 1c1(1) –oatmif 1b1 –ovpi 0 –ovci 100
NOTICE: vci=2304
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
1C1(1) pvc 1C1 0 2304 N/A 1B1 0 100
ATM SWITCH:services ces-v2-> new –icbrservice 1c1(2)
NOTICE: vci=2336
INFO: CES upc contract obtained. Index = 1.
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
1C1(1) pvc 1C1 0 2304 N/A 1B1 0 100
1C1(2) pvc 1C1 1 2336 N/A N/A N/A N/A
17 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES Ch DS3 Netmod Configuration -3
ATM SWITCH:-> connections upc show
Service Police
Index Category Scheme PCR SCR MBS MCR CDVT Name
0 UBR ubr1 default_ubr
1 CBR cbr1 4107 3000 ces_cbr4107
ATM SWITCH:-> services ces-v2 show -advanced
CBR Service Service Clock Partial MaxBuff Rx Integ
Interface Type CAS Mode Fill Size CDVT Period
1C1(1) unstructured N/A synchronous 0 2000 500 2500
1C1(2) unstructured N/A synchronous 0 2000 500 2500
ATM SWITCH:-> services ces-v2 statistics
CBR Service Reass Lost Misinserted Buffer Buffer CellLoss
Interface Cells Cells Cells UnderFlows OverFlows Status
1C1(1) 0 0 0 0 0 noLoss
1C1(2) 0 0 0 0 0 noLoss
18 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES Ch OC-3 Netmod/Port Card Configuration -1
ATM SWITCH:-> services ces-v2
ATM SWITCH:services ces-v2-> new ?
[-icbrservice] <CbrServiceIf> Input CES Service Interface
[[-ocbrservice] <CbrServiceIf>] Output CES Service Interface
[[-oatmif] <AtmIf>] Output AtmIf
[[-ovpi] <integer>] Output VPI
[[-ovci] <integer>] Output VCI
[[-clockmode] <clockmode>] CBR Clock Mode (default: synchronous)
[[-cas] <cas>] CAS
[[-partialfill] <integer>] Partial Fill (default: 0)
[[-bufmaxsize] <integer>] Buffer Max Size (default: 2000)
[[-reasscdvt] <integer>] Reassembled CDVT (default: 500)
[[-integperiod] (1000..65535)] Integration Period (default: 2500)
[[-adminstatus] <ifadminstatus>] Admin Status (default: up)
[[-statsenable] <cesstatsenable>] CES Stats Enable
[[-tcmode <tcmode>] Trunk Condition Mode
[[-tcsignal] <Hex Integer>] <0..F> Trunk Condition Signal
[[-tcdata] <Hex Integer>] <0..FF> Trunk Condition Data
19 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES Ch OC-3 Netmod/Port Card Configuration -2
Normal Connection:
Dangling Connection:
ATM SWITCH:services ces-v2-> new –icbrservice 1a1[1](1,1) –oatmif 2b1 –ovpi 0 –ovci 100
NOTICE: vci=2304
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
1A1[1](1,1) pvc 1A1[1] 0 2304 N/A 2B1 0 100
ATM SWITCH:services ces-v2-> new –icbrservice 1a1[2](1,1)
NOTICE: vci=2304
INFO: CES upc contract obtained. Index = 1.
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
1A1[1](1,1) pvc 1A1[1] 0 2304 N/A 2B1 0 100
1A2[2](1,1) pvc 1A1[2] 0 2304 N/A N/A N/A N/A
20 Copyright © 2005 Marconi Corporation plc. All rights reserved
Unstructured CES Ch OC-3 Netmod/Port Card Configuration -3
ATM SWITCH:-> connections upc show
Service Police
Index Category Scheme PCR SCR MBS MCR CDVT Name
0 UBR ubr1 default_ubr
1 CBR cbr1 4107 3000 ces_cbr4107
ATM SWITCH:-> services ces-v2 show -advanced
CBR Service Service Clock Partial MaxBuff Rx Integ
Interface Type CAS Mode Fill Size CDVT Period
1A1[1](1,1) unstructured N/A synchronous 0 2000 500 2500
1A2[2](1,1) unstructured N/A synchronous 0 2000 500 2500
ATM SWITCH:-> services ces-v2 statistics
CBR Service Reass Lost Misinserted Buffer Buffer CellLoss
Interface Cells Cells Cells UnderFlows OverFlows Status
1A1[1](1,1) 0 0 0 0 0 noLoss
1A1[2](1,1) 0 0 0 0 0 noLoss
21 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES DS1 Netmod Configuration -1
Normal Connection:
Dangling Connection:
ATM SWITCH:services ces-> new –iatmif 1a1 –its 1-3 –oatmif 1b1 –ovpi 0 –ovci 100 –cas cas
ATM SWITCH:services ces-> show
CES Input Output
Id State AtmIf TimeSlots VPI VCI Type AtmIf TimeSlots VPI VCI
1024 up 1A1 1-3 0 129 pvc 1B1 N/A 0 100
ATM SWITCH:services ces-> new –iatmif 1a2 –its 1-5 –cas cas
ATM SWITCH:services ces-> show
CES Input Output
Id State AtmIf TimeSlots VPI VCI Type AtmIf TimeSlots VPI VCI
1024 up 1A1 1-3 0 129 pvc 1B1 N/A 0 100
1025 down 1A2 1-5 0 130 N/A N/A N/A N/A N/A
22 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES DS1 Netmod Configuration -2
ATM SWITCH:-> connections upc show
Service Police
Index Category Scheme PCR SCR MBS MCR CDVT Name
0 UBR ubr1 default_ubr
1 CBR cbr1 667 3000 ces_cbr667
2 CBR cbr1 1112 3000 ces_cbr1112
ATM SWITCH:services ces-> show -advanced
CES Map Map Service Clock Partial Max Integ. Reass
Index VPI VCI Type Mode Cas Fill Buf Period CDVT
1024 0 129 structured synch cas 47 768 2500 2000
1025 0 130 structured synch cas 47 1280 2500 2000
ATM SWITCH:services ces-> statistics
CES Reass Header Pointer Buffer Buffer CellLoss
Id Cells Errors Reframes Lost Cells UnderFlows OverFlows Status
1024 0 0 0 0 0 0 noLoss
1025 0 0 0 0 0 0 noLoss
23 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch DS3 Netmod Configuration -1Enable DSX1 Interfaces:ATM SWITCH:-> interfaces dsx1
ATM SWITCH:interfaces dsx1-> show -advanced
DSX1 Port Line Upstream Channel
Interface Timing Length AIS Model Mode
1A1 localTiming Lt40 disabled CESDS1 N/A
1A2 localTiming Lt40 disabled CESDS1 N/A
1A3 localTiming Lt40 disabled CESDS1 N/A
1A4 localTiming Lt40 disabled CESDS1 N/A
1A5 localTiming Lt40 disabled CESDS1 N/A
1A6 localTiming Lt40 disabled CESDS1 N/A
1C1(1) N/A N/A disabled CESCDS3 dsx1disabled
1C1(2) N/A N/A disabled CESCDS3 dsx1disabled
1C1(3) N/A N/A disabled CESCDS3 dsx1disabled
1C1(4) N/A N/A disabled CESCDS3 dsx1disabled
1C1(5) N/A N/A disabled CESCDS3 dsx1disabled
1C1(6) N/A N/A disabled CESCDS3 dsx1disabled
ATM SWITCH: interfaces dsx1-> mod –lineindex 1c1(1) –channelization dsx1enabledDs0
WARNING: The port is currently active. If you proceed, any connections will be interrupted
Do you wish to continue (y or n): y
24 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch DS3 Netmod Configuration -2
Normal Connection:
Create DS0 Bundles:ATM SWITCH:interfaces ds0bundle-> new -bundleindex ds0bundle1 –ds0slist {1c1(1,1);
1c1(1,2); 1c1(1,3)}
ATM SWITCH:interfaces ds0bundle-> show
DS0Bundle Admin Oper Loopback Configured
Interface State State DS0s
DS0BUNDLE1 up down disabled 1C1(1,1)
1C1(1,2)
1C1(1,3)
ATM SWITCH:services ces-v2-> new –icbrservice ds0bundle1 –oatmif 1b1 –ovpi 0 –ovci 100 –cas ds1esfcas
NOTICE: vci=2304
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
DS0BUNDLE1 pvc 1C1 32 2304 N/A 1B1 0 100
25 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch DS3 Netmod Configuration -3Dangling Connection:ATM SWITCH:services ces-v2-> new –icbrservice ds0bundle2 –cas ds1esfcas
NOTICE: vci=2336
INFO: CES upc contract obtained. Index = 2.
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
DS0BUNDLE1 pvc 1C1 32 2304 N/A 1B1 0 100
DS0BUNDLE2 pvc 1C1 33 2336 N/A N/A N/A N/A
26 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch DS3 Netmod Configuration -4
ATM SWITCH:connections upc-> show
Service Police
Index Category Scheme PCR SCR MBS MCR CDVT Name
0 UBR ubr1 default_ubr
1 CBR cbr1 512 3000 ces_cbr512
2 CBR cbr1 527 3000 ces_cbr527
ATM SWITCH:services ces-v2-> show -advanced
CBR Service Service Clock Partial MaxBuff Rx Integ
Interface Type CAS Mode Fill Size CDVT Period
DS0BUNDLE1 structured ds1EsfCas synchronous 0 2000 500 2500
DS0BUNDLE2 structured ds1EsfCas synchronous 0 2000 500 2500
ATM SWITCH:services ces-v2-> statistics
CBR Service Reass Lost Misinserted Buffer Buffer CellLoss
Interface Cells Cells Cells UnderFlows OverFlows Status
DS0BUNDLE1 0 0 0 0 0 noLoss
DS0BUNDLE2 0 0 0 0 0 noLoss
27 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch OC-3 Netmod/Port Card Configuration -1
Enable DSX1 Interfaces:ATM SWITCH:interfaces dsx1-> show -advanced
DSX1 Port Line Upstream Channel
Interface Timing Length AIS Model Mode
1A1[1](1,1) throughTiming Lt40 disabled CH0C3CES dsx1disabled
1A1[1](1,2) throughTiming Lt40 disabled CH0C3CES dsx1disabled
1A1[1}(1,3) throughTiming Lt40 disabled CHOC3CES dsx1disabled
ATM SWITCH: interfaces dsx1-> mod –lineindex 1a2[1](1,1) –channelization dsx1enabledDs0
WARNING: The port is currently active. If you proceed, any connections will be interrupted
Do you wish to continue (y or n): y
28 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch OC-3 Netmod/Port Card Configuration -2
Normal Connection:
Create DS0 Bundles:ATM SWITCH:interfaces ds0bundle-> new -bundleindex ds0bundle1 –ds0slist {1a2[1]
(1,1,1); 1a2[1](1,1,2); 1a2[1](1,1,3); 1a2[1](1,1,4); 1a2[1](1,1,5)}
ATM SWITCH:interfaces ds0bundle-> show
DS0Bundle Admin Oper Loopback Configured
Interface State State DS0s
DS0BUNDLE1 up down disabled 1A2[1](1,1,1)
1A2[1](1,1,2)
1A2[1](1,1,3)
1A2[1](1,1,4)
ATM SWITCH:services ces-v2-> new –icbrservice ds0bundle1 –oatmif 2b2 –ovpi 0 –ovci 100 –cas ds1esfcas
NOTICE: vci=2304
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
DS0BUNDLE1 pvc 1A2[1] 0 2304 N/A 2B2 0 100
29 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch OC-3 Netmod/Port Card Configuration -3
Dangling Connection:
ATM SWITCH:services ces-v2-> new –icbrservice ds0bundle2 –cas ds1esfcas
NOTICE: vci=2305
INFO: CES upc contract obtained. Index = 2.
ATM SWITCH:services ces-v2-> show
CBR Service Conn INPUT OUTPUT
Interface Type AtmIf VPI VCI ServiceIf Atmif VPI VCI
DS0BUNDLE1 pvc 1A2[1] 0 2304 N/A 2B2 0 100
DS0BUNDLE2 pvc 1A2[1] 0 2305 N/A N/A N/A N/A
30 Copyright © 2005 Marconi Corporation plc. All rights reserved
Structured CES Ch OC-3 Netmod/Port Card Configuration -4
ATM SWITCH:connections upc-> show
Service Police
Index Category Scheme PCR SCR MBS MCR CDVT Name
0 UBR ubr1 default_ubr
1 CBR cbr1 875 3000 ces_cbr875
2 CBR cbr1 1046 3000 ces_cbr1046
ATM SWITCH:services ces-v2-> show -advanced
CBR Service Service Clock Partial MaxBuff RX Integ
Interface Type CAS Mode Fill Size CDVT Period
DS0BUNDLE1 structured ds1EsfCas synchronous 0 2000 500 2500
DS0BUNDLE2 structured ds1EsfCas synchronous 0 2000 500 2500
ATM SWITCH:-services ces-v2-> statistics
CBR Service Reass Lost Misinserted Buffer Buffer CellLoss
Interface Cells Cells Cells UnderFlows OverFlows Status
DS0BUNDLE1 0 0 0 0 0 noLoss
DS0BUNDLE2 0 0 0 0 0 noLoss
31 Copyright © 2005 Marconi Corporation plc. All rights reserved
Summary
Explain Circuit Emulation Service (CES) Define the role of the Circuit Emulation (CEM) netmods and
port card Describe the features of the CEM netmods and port card Compare and contrast CAS and CCS signalling Explain structured and unstructured CES Explain DS3 and OC-3 channelization Create an unstructured CES instance Create a structured CES instance