Nortel DMS-100 Series Maintenance Manual page 33

Remote line concentrating module

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Under normal conditions, when both LCCs are active, LCC-0 connects

LCA-0, and LCC-1 connects LCA-1. The LCC-0 serves even numbered

DS-1 links (0, 2, and 4) from the DS-1 interface cards. The LCC-1 serves

odd numbered DS-1 links (1, 3, and 5). The following figure describes how

the LCCs are configured in the RLCM.

The 24 channels of a DS-1 link can come out of one 32-channel DS30A

port. This event occurs when one-to-one mapping of LCA primary ports

with DS-1 links occurs. Additional channels are used for control and

signaling, from the host, and for intra- and interspeech channels.

As illustrated in figure RLCM link, port and channel structure. The LCC

accepts eight DS30A links from the associated LCA. Through the LCC,

these links provide the following:

message and speech paths to the host

connection to the RMM

link-sharing resources for each LCA

LCC interface to DS-1 interface cards

DS-1 links 0

DMS-100 Family RLCM Maintenance Manual XPM12 and up

To host office

Maintenance overview 1-17

I/S: intershelf link

Troubleshooting