Opm Configuration; Opm Cabinet - Nortel DMS-100 Series Maintenance Manual

•
•
Cards that can appear in the RMM are as follows:
•
•
•
•
•
•
•
•
If the OPM has ESA, the RMM shelf must contain the ESA Digitone receivers
(NT2X48).
OPM configuration
The OPM is a freestanding configuration of the OPM housed in a special
cabinet. This special cabinet provides mechanical protection and a controlled
environment for the OPM electronic equipment. The OPM is available in two
configurations. These configurations are the OPM-640 and the OPM-256.
The OPM-640 has the capacity for 640 subscriber lines. The OPM-256 has the
capacity for 256 subscriber lines and can expand to 576 lines. The following
sections provide a general description of the OPM components. Any
components that are different to configuration and optional components are
discussed separately. The OPM bay configuration appears in the figure OPM
bay frame and equipment arrangement OPM-640 (NT8X01AA, AB).

OPM cabinet

The OPM cabinet is 1676 mm wide, 1676 mm high, and 660 mm deep (66
inches by 66 inches by 26 inches). An empty cabinet weighs approximately
400 kg (880 lb). A fully equipped cabinet with electronics and batteries,
weighs approximately 1000 kg (2200 lb). The housing consists of 13-gauge
cold-rolled steel, except for bay frames and bases, which use heavier materials.
The base is galvanized to provide additional corrosion resistance. The cabinet
consists of a main compartment and an end-access compartment, which this
section describes.
Main compartment
The main compartment houses the repackaged OPM, ac breakers, rectifiers,
batteries, environmental control system, and the optional calibration device.
NT2X06AB—Power converter common feature
NT2X09AA—Multi-output power cards
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
DMS-100 Family OPM Maintenance Manual XPM14 and up
OPM hardware 5-5