Nortel DMS-100 Series Maintenance Manual page 108

2-6 PRLCM overview
LCA port assignments and use
Number
6
7
PCM30 interface cards
Slots 19 and 20 of the HIE shelf hold the PCM30 interface cards (NT6X50).
Provision an additional card in slot 21 to replace the filler panel. Each
PCM30 interface card accepts two PCM30 links from the host office
LGC/LTC. The PCM30 connects the two PCM30 links to a maximum of six
links to the LCC.
A minimum of two PCM30 cards must carry the two primary message
channels from the LCM. Provision a third PCM30 card only if the traffic
load of the PRLCM requires six PCM30 links to the host.
The PCM30 ports are not duplicated. Each processor in the LCA shelves of
the PRLCM can control all six PCM30 ports.
Primary ports that map one to one with PCM30 links are known as equipped
ports. The number of equipped ports in an LCA depends on the number of
PCM30 interface cards in the HIE. If the HIE has three PCM30 cards, all
three primary ports (0, 1, 2) for each LCA are equipped. If a port is
unequipped, the port is not in use or used for features contained in other
PRLCM feature packages.
297–8351–550 Standard 04.01 August 1999
(continued)
Port type Functions
Interlink Provides a DS30A link for intershelf connections.
The channels on this port allow a subscriber line
on one LCA to connect to a subscriber line in the
mate LCA. This action occurs during call
processing. The connection of the subscriber
lines leaves the PCM30 channels to the host office
free.
Maintenance Provides the LCA with access to the RMM through
the LCCs. The RMM ports allow the selection of
each line circuit. The RMM ports allow the
metallic test access (MTA) connections on the tip
and ring leads for testing.
—end—