Modular Supervisory Panel - Nortel DMS-100 Series Maintenance Manual

Maintenance overview 1-29
The miscellaneous scan (SC) card (NT0X10AA) provides an interface
where the DMS-100 alarm system software can monitor the state of the
OPAC hardware. The system monitors the OPAC hardware state to
detect alarm conditions or manually controlled operations. The SC card
divides into two circuits. Each circuit is an SC group. Each SC group
contains seven SC points. Each SC point connects one circuit to monitor
for a change in state.
The Digitone Receiver (DTR) Card (NT2X48AB) contains four Digitone
Receivers to collect digits during OPAC ESA.
The multiline test unit (MTU) card (NT2X10BA, NT2X11BA) is a
testing facility that can connect to a selected line circuit through the
remote MTA. The MTU contains two cards, an analog test and
measurement card (NT2X10BA) and a control card (NT2X11BA). The
two cards must be side by side, and the NT2X10BA must be in an
odd-numbered slot. The MTU performs tests and measurements on a
subscriber loop or line card circuit. The MTU can test MBS lines and
OPAC battery maintenance. The NT2X11BA control card is an interface
between the MTU analog card and the RMM. The MTU contains two
internal test units.
The incoming/outgoing test trunk card (NT2X90AC) provides an
interface between external test equipment (like the number 14 line test
desk) and the RMM. The test trunk card provides monitoring and
speech circuits to subscriber lines. The test trunk enables operator calls
that verify through a VER90 trunk.

Modular supervisory panel

The NTRX40AA MSP contains the following:
two talk battery filter (NTRX44AA) modules that provide filtered power
feed and inrush current protection
one alarm module (NTRX41AA) that performs the following:
— monitors and detects faults
— provides maintenance facilities in the form of telephone, data, and
alarm battery supply (ABS) jacks
three fuse modules (NTRX43AA) that perform the following:
— act as termination points for power feeds
— supply current-limited outputs for miscellaneous circuits
— report fuse and breaker failures to the NTRX41AA alarm module
one fan alarm module (NTRX66AA) to monitor fans in the roof and
auxiliary cooling units and determine if any fans failed
DMS-100 Family OPAC Maintenance Manual XPM12 and up