Lcm Control Complex Cards - Nortel DMS-100 Series Maintenance Manual

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Table of Contents

Figure 2 LCA shelf layout

LCA: NT6X04AA, AB

Note: The NT6X04AA contains the NT6X51AA 64 kB processor card that requires

the LCM software load. The NT6X04AB contains the NT6X51AB/AC 256 kB

processor cards that requires the XLCM software load.

LCM control complex cards

The LCM processor (LCMP) card and digroup control card (DCC) are referred

to as common cards in the LCA. In each LCA, the common cards function in

the same way. The common cards are always provided. The functions of these

cards follow.

XLCM processor card

Slot 04 of each LCA shelf (NT6X04AB) contains the extended-memory line

concentrating module (XLCM) processor card (NT6X51AB/AC). The XLCM

processor card connects with the digroup control card (DCC) to form the

control complex for the LCA. The control complex for the LCA checks sanity

and monitors activity. The XLCM processor monitors the power and ringing

generator functions of the OPM.

The XLCM contains 256 kB of RAM storage. The XLCM collects dial pulse

digits from subscriber lines. The XLCM handles messages to and from the

6X51AA, AB, AC

DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up

Line drawers

Power converter. Also contains ringing

and ANI voltage switching circuits.

LCM processor card (see note)

Digroup control card

Line subgroup

Functional overview 2-5