Overview of the OCx Interface Module
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1-port OC-48/STM-16 or 4-port OC-12/OC-3 / STM-1/STM-4 + 12-port T1/E1 + 4-port T3/E3 CEM Interface Module (A900-IMA3G-IMSG)
-
1-Port OC-192 or 8-Port Low Rate CEM Interface Module (A900-IMA8S1Z-CX)
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ASR 900 1-Port OC-192 or 8-Port Low Rate CEM 20G Bandwidth Interface Module (A900-IMA1Z8S-CXMS)
SONET Modes
SONET supports the following Circuit Emulation over Packet (CEP), Structure- Agnostic TDM over Packet (SATOP), and Circuit Emulation over Packet-Switched Network (CESoPSN) modes:
CEP Modes
-
STS-48C
-
STS-12C
-
STS-3C
-
STS-1
-
VT 1.5
SAToP or CESoP
-
VT1.5-T1
-
T3
-
CT3-T1
The following table provides required clock and CEM configuration that is supported on each of the SONET mode:
|
STS-48C |
STS-12C |
STS-3C |
STS-1 |
VT 1.5 |
VT 1.5 T1 |
T3 |
CT3-T1 |
|
|---|---|---|---|---|---|---|---|---|
|
Required Configuration |
||||||||
|
Mode |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Internal/Line Clock Source |
Internal |
Internal |
Internal |
Internal |
Internal |
Yes |
Yes |
Yes |
|
ACR/DCR Clock |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
|
CEM Configurations |
||||||||
|
CEP |
Yes |
Yes |
Yes |
Yes |
Yes |
NA |
Yes |
NA |
|
SAToP Framed |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
|
SAToP Unframed |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
|
CESoPSN |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
|
Interworking Multiservice Gateway (iMSG) 1 |
||||||||
|
iMSG |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Serial Interfaces |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
iMSG ACR |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Multilink Interfaces |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
VLAN Handoff |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
OCx Port Protection |
||||||||
|
APS |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
OCx Path Protection |
||||||||
|
UPSR |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
UPSR over HDLC |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
SDH Modes
SDH supports the following modes:
-
AU-4-16c (VC4-16c)
-
AU-4-4c (VC4-4c)
-
AU-4 (VC4)
-
AU-4 — TUG-3 — VC-3 — T3 (TUG-3 — T3)
-
AU-4 — TUG-3 — VC-3 — E3 (TUG-3 — E3)
-
AU-4 — TUG-3 — TUG-2 — VC-11 (TUG-2 — VC-11)
-
AU-4 — TUG-3 — TUG-2 — VC-12 (TUG-2 — VC-12)
-
AU-4 — TUG-3 — TUG-2 — VC-12 — E1 (TUG-2 — E1)
-
AU-3 — VC-3 — T3 (VC-3 — T3)
-
AU-3 — TUG-2 — VC-11 — T1 (TUG-2 — T1)
-
AU-3 — TUG-2 — VC-11 (TUG-2 — VC-11)
-
AU-3 — TUG-2 — VC-12 (TUG-2 — VC-12)
-
AU-3 — VC-3 — E3 (VC-3 — T3)
The following table provides required clock and CEM configuration that is supported on each of the SDH mode. The SDH modes provided in brackets are only for the documentation purpose:
|
VC4-16c |
VC4-4c |
VC4 |
TUG-2-VC11 |
TUG-2-VC12 |
TUG-3-E3 |
TUG-3-T3 |
TUG-2-VC11-T1 |
TUG-2-VC12-E1 |
|
|---|---|---|---|---|---|---|---|---|---|
|
Required Configuration |
|||||||||
|
Mode |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Internal/Line Clock Source |
Internal |
Internal |
Internal |
Internal |
Internal |
Yes |
Yes |
Yes |
Yes |
|
ACR/DCR Clock |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
Yes |
|
CEM Configurations |
|||||||||
|
CEP |
Yes |
Yes |
Yes |
Yes |
Yes |
NA |
NA |
NA |
NA |
|
SAToP Framed |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
Yes |
|
SAToP Unframed |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
Yes |
|
CESoPSN |
NA |
NA |
NA |
NA |
NA |
Yes |
Yes |
Yes |
Yes |
|
Interworking Multiservice Gateway (iMSG) |
|||||||||
|
iMSG |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Serial Interfaces |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
iMSG ACR |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
OCx Port Protection |
|||||||||
|
MSP |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
OCx Path Protection |
|||||||||
|
SNCP |
Yes |
Yes |
Yes |
Yes |
Yes |
NA |
NA |
NA |
NA |
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