Rmm; Cooling Unit (Cu) - Nortel DMS-100 Series Maintenance Manual

RMM

An optional component of the RLCM-EDC is the RMM. The RMM is in
the RMM shelf assembly. The RMM is a single-shelf module based on the
maintenance trunk module (MTM). The RMM provides maintenance and
service capabilities for the RLCM-EDC. The RMM consists of two power
converters, an RMM control card, a codec and tone card. The RMM can
contain a maximum of 14 provisionable service cards.
The RMM contains one set of common cards (NT6X13AB). The common
cards in the RMM are as follows:
NT2X59AA—Group codec
NT6X74AB—RMM control
NT2X06AB—Power converter common feature
NT2X09AA—Multi-output power cards
Cards that can be provisioned in the RMM follow:
NT2X90AD—Incoming/outgoing test trunk
NT2X10AC—Line test unit analog
NT2X11AD—Line test unit digital
NT2X10BA—Multi-line test unit analog
NT2X11BA—Multi-line test unit digital
NT3X09AA, BA—Remote metallic test access
NT0X10AA—Scan card
NT2X57AA—Signal distribution

Cooling unit (CU)

The CU (NTNX27AA) includes six circulation fans. The circulation fans
use forced-air convection to cool the four shelves of cards in the
RLCM-EDC cabinet. The following figure shows the layout of the CU.
DMS-100 Family Maintenance Manual ABSK007
RLCM-EDC hardware 3-5