Nortel DMS-100 Series Maintenance Manual page 99

engineering requirements. An example of card selections for a standard RMM
appear in the "RMM shelf layout" diagram.
RMM control card
The RMM requires the RMM control card (NT6X74AB), located in slot 02.
The RMM control card acts as an interface. This interfrace occurs between the
line concentrating array shelves and the test trunks, service circuits and alarm
circuits of the RMM. The RMM control card processes DMS-X messages,
trunk messages and pulse code modulation (PCM) data.
Power converters
The two types of power converters required in the RMM shelf follow:
• multi-output power converter (NT2X09)
• 5-V/40-A power converter (NT2X06)
The multi-output power converter occupies slots 17 and 18 of the RMM. This
power converter provides a regulated, common-ground dc power supply. The
power supply has five different outputs: +24 V, +12 V, +5 V, -15 V, and -5 V.
The other power converter, in slot 20 to the farthest right slot of the RMM,
provides a regulated 5-V/40-A power supply to the RMM shelf.
The RMM requires the group codec card (NT2X59AA), which is at the far left
of the RMM shelf in slot 01. The codec card codes analog samples from the
RMM trunk circuits into PCM code words. When this event occurs, the codec
card decodes the PCM words from the host or OPM 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. In the OPM some slots of the RMM are hard wired for use by specific
cards. These provisionable cards follow:
• Remote metallic test access, (remote MTA) card (NT3X09AA). The
remote MTA consists of a two-wire metallic matrix with eight horizontal
buses and four vertical buses. In the OPM the NT3X09AA is used as the
BCCDVR card. This card relays battery control commands from system
software to the NT8X02 BCC card to move the battery strings. The
BCCDVR moves the battery strings between the open circuit state, load
bus, charge bus and discharge bus. The BCCDVR card must go in slot 6.
• Metallic test access (MTA) card (NT3X09BA). The MTA card provides
the LTU or MTU, which are connected to one horizontal bus, with metallic
access to the LCM line circuits and to each battery string and the charge
buses. The MTA card consists of a two-wire metallic matrix with eight
horizontal buses and eight vertical buses. The MTA card must go in slot 5.
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
Functional overview 2-23