Fault Conditions; Lca Shelf Failure - Nortel DMS-100 Series Maintenance Manual

Hardware limits
The following hardware limits apply to the NTX146AA:
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Software limits
Feature package NTX146AA requires the following software packages to
operate:
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Fault conditions

Several types of faults can occur in the parts of the OPM. In the host office,
the C-side links from the OPM to the host LTC/LGC can lose activity. When
these network links are defective, messaging from the CC can be lost, and
subscriber service can be lost.
A circuit card in the OPM, or the power converter card, can be defective. This
condition can affect subscriber service in a negative way. OPM equipment,
other than circuit cards, can become defective.
The OPM P-side links toward the subscriber carry messages important to the
maintenance of subscriber service. A defective peripheral side link can impact
subscriber service.
The following sections describe the exact fault conditions that occur in OPM
parts and the interfaces between OPM components.

LCA shelf failure

When a fault condition causes one of the LCA units in the LCM to lose service,
the following occurs. The InSv unit assumes control of the mate unit lines, in
One OPM can serve a maximum of 640 lines.
The OPM has a maximum traffic-carrying capacity of eight CCS/line, or a
maximum of 1.5 calls/second.
A minimum of two and a maximum of six DS-1 (T-span) links connect the
OPM with the host office.
All DS-1 links to the OPM must terminate on the same host LGC or LTC.
These DS-1 links must terminate on different DS-1 interface cards.
The maximum power input to the OPM bay is 35 A at -48 V.
NTX000AA: Bilge
NTX001AA: Common Basic
NTX270AA: New Peripheral Maintenance Package
NTX901AA: Local Features I
The OPM requires feature package NTX156AA, OPM Intracalling for
intraswitching capability. The OPM requires feature package
NTX154AA, Emergency Stand-Alone Operation to have ESA capability.
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
Functional overview 2-29