Nortel DMS-100 Series Maintenance Manual page 44

1-28 Maintenance overview
RMM equipment shelf layout
Slot Abbreviation
09–10 I/O test
11–12 Digitone RCVR
13–16
17, 18
19
20
Note: The NT2X48AB card is part of the ESA hardware package. Requirement of this card occurs
when the ESA option is provisioned.
The group coder/decoder (CODEC) card NT2X59AA, located at the far left
of the RMM shelf in slot 01, is required. This card codes analog samples
from the RMM trunk circuits into PCM code words. This card decodes the
PCM words from the host or OPAC lines into analog samples.
Provisionable maintenance and service cards
Slots 03–16 of the RMM can be provisioned with various maintenance, test,
and service circuits. The number and types of these cards depend on
engineering needs. These provisionable cards follow:
297-8211-550 Standard 05.01 August 1999
(continued)
NT PEC
NT2X90AD
NT2X48AB
NT0X50AC
NT2X09AA
NT0X50AC
NT2X06AB
The remote metallic test access (RMTA) card (NT3X09AA) provides
metal connections between test access points in the line circuits and
testing equipment. This card consists of a two-wire metal matrix with
four vertical buses and eight horizontal buses. One vertical bus connects
to the MTA bus for the 320 line circuits in LCA-0. The other vertical
bus connects to a similar MTA bus in LCA-1. Two vertical buses are not
used. The horizontal buses connect to service circuits or spare line
circuits. Host office circuits provide MTA functions during normal
OPAC operation.
The 8x8 metallic test access (MTA) card (NT3X09BA) performs the
same functions as the 3X09AA. This card has eight vertical buses and
eight horizontal buses.
Remarks
Input/output test card with NT2X77AA daughter
board
Digitone receiver
Filler panel
Multioutput power converter
Filler panel
Power converter common features
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