Diagnostic Tests For The Sms; Rom Diagnostic - Nortel DMS-100 Series Maintenance Manual

9-38 Trouble isolation and correction
The following is a list of information that appears in log reports ALT101 or
LINE101 or at the MAP display. The information is for station ringer and
dialable short circuit tests that the system aborts:

Diagnostic tests for the SMS

Diagnostic tests must find hardware faults in levels down to a card level
where replacement can occur. Initiation of the tests can be system or
manual. System initiated diagnostics generate when internal counters
exceed fixed levels. Operating company personnel must use manually
initiated diagnostics in the following conditions:

ROM diagnostic

The read-only memory (ROM) diagnostic detects faults in the unified
processor and memory card. The SMS unit can be in the who-am-I (WAI)
state. This condition initiates the ROM diagnostic.
The ROM diagnostic tests the following memory card circuits:
The ROM diagnostic tests the following processor card circuits:
297-8231-550 Standard 09.01 August 1998
connection failure
PM is not ready
check the channel test unit, the line card, or both
no SMS P-side channel
PM reply time-out
PM reply not expected
software error.
log reports indicate a common equipment problem
system generates system detected alarms
the OMs show high error counts.
memory circuits
parity circuits
direct memory access (DMA) circuitry
activity circuits
holding registers
memory mapper unit
universal synchronous/asynchronous receive/transmit integrated circuits