Lca Shelf Configuration - Nortel DMS-100 Series Maintenance Manual

2-4 Functional overview
can be accommodated. The number of ports depend on traffic capacity and the
concentration ratio required.

LCA shelf configuration

The layout of the LCA shelves and line drawers of the OPM appears in the
"LCA shelf layout figure".
An LCA shelf contains the following parts:
•
•
•
The power converter card is at the far left of the LCA shelf (slots 01-03). The
control complex cards are next to the LCA shelf (slots 04-05). The five line
drawers fill the remainder of the shelf.
Power converter card
The power converter card (NT6X53), in slots 01-03 of the LCA contains
circuits for converting a -48 V office battery to regulated +5 V and +15 V
outputs for the shelf circuitry. The power converter contains relay circuits.
The relay circuits control the application of the following actions between the
ringing generator and the LCM line circuits:
•
•
•
When the mate converter fails, the arrangement of power connections to the
two shelves of an LCM are important. One converter can supply power to both
shelves.
297-8361-550 Standard 04.02 December 2004
one power converter
one control complex
five line drawers
ringing
automatic number identification (ANI)
coin voltages