Remote Maintenance Module - Nortel DMS-100 Series Maintenance Manual

Power converter card
Two HIE power converter supply necessary shelf voltages (5 V, 12 V) for
the HIE shelf. These power converters are in slots 22 to 24, and 25 to 27.
ESA control complex
If the user selects the ESA feature package, two configurations are possible.
The NT6X45AF based ESA package consists of three pieces of equipment:
one ESA memory card (NT6X47AC), slot 14
one ESA processor card (NT6X45AF), slot 15
one ESA clock and tone card (NT6X75AA), slot 16
The NTMX45AA based ESA package consists of two pieces of equipment.
This package includes an ESA processor that enables duplicate Nxx in ESA
mode and provides firmware downloads. This card has 8 Mbytes of on-card
memory. With this package, the ESA memory card is not needed and slot 14
has a filler plate.
one ESA processor card (NTMX45AA), slot 15
one ESA clock and tone card (NT6X75AA), slot 16

Remote maintenance module

The following paragraphs describe the remote maintenance module (RMM).
RMM description
The RMM occupies one shelf in the OPAC The RMM is a modified form of
the maintenance trunk module (MTM) with reduced cost. The RMM
contains a processor for the RMM. This processor scans service circuits and
digit collection during ESA.
The RMM C-side interface uses a pair of DS30A links, one to each LCC, in
the HIE shelf. The DS30A links make sure that the RMM can operate when
any LCC is active. The LCC passes maintenance requests from the host to
the RMM. The LCC provides a link between the RMM and line circuits in
the LCA.
At the host office, operating company personnel use the MAP terminal to
direct OPAC maintenance to the RMM. The following figure shows how
the RMM communicates with the host and the LCA through the LCC. The
RMM uses DMS-X protocol to communicate with the host in a reliable
method. The RMM uses the LCC interface to the DS-1 links.
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Maintenance overview 1-25