Cisco MGX MGX 8800 Hardware Installation Manual page 199

Chapter 2 Illustrated Card List for MGX Switches and the MGX 8880 Media Gateway
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For module configuration information, refer to
Redundancy, and Bulk
The following are card-level characteristics that apply to any SRM installation:
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When the SRM is combined with a back card, a card set is created.
about each SRM card, interface, and corresponding back card.
Back cards are optional for BERT and 1:N card set redundancy.
Note
Table 2-29
SRM
SRM-3T3/C
SRME/B
SRME
For technical specifications for the SRM cards, see the
Note
SRM-3T3/C
Supported models: MGX 8850 (PXM1E/PXM45), MGX 8850/B (PXM1E/PXM45), MGX 8830, MGX 8830/B
The SRM-3T3/C provides bulk distribution (on T1 lines only), 1:N card set redundancy for the T1 and
E1 service modules, and bit error rate testing (BERT). Bulk distribution manages traffic over
T3 interfaces and is supported for T1 interface speeds only.
Figure 2-31
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Bulk Distribution—MGX 8830, MGX 8850 (PXM45), and MGX 8850 (PXM1E)
Distribution".
No other service modules can be installed in the SRM slots because the slots do not have cell bus
connections. The SRM cards use a local bus to communicate with the PXM45 or PXM1E installed
in the same bay. Only SRM cards can be installed in slots:
15, 16, 31, and 32 for an MGX 8850 (PXM1E or PXM45) switch.
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7 and 14 for an MGX 8830 switch.
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On an MGX 8850 (PXM1E or PXM45) switch, the PXM45 or PXM1E in slot 7 controls the SRM
cards in slots 15 and 31. The PXM45 or PXM1E in slot 8 controls the redundant SRM cards in slots
16 and 32.
On an MGX 8830, the PXM1E in slot 1 controls the SRM card in slot 7, and the PXM1E in slot 2
controls the redundant SRM card in slot 8.
Both SRM cards in a pair must be the same model. You can have two SRM-3T3/Cs or two SRME
cards. However, you cannot mix an SRME with an SRM-3T3/C.
The PXM45 cards support only the SRME card.
SRM Cards, Interfaces, and Supported Back Cards
Supported Back
Card
BNC-3T3/C
SMFIR-1-155
STM1-EL-1
SMFIR-1-155
STM1-EL-1
shows an SRM-3T3/C faceplate.
Chapter 4, "Planning for Card Redundancy, Line
Interface Connection
Channelized T3
Channelized T3
Channelized 155 Mbps
Channelized 155 Mbps
Channelized 155 Mbps
"SRM Specifications" section on page
Cisco MGX 8800/8900 Series Hardware Installation Guide
Table 2-29 provides information
Types of Lines Number of Lines
Supported Supported
T3 3
T3 3
STM1 SDH 1
OC-3c/STS SONET 1
STM1 SDH 1
Front Cards
A-8.
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