Nortel DMS-100 Series Maintenance Manual page 110

2-34 Functional overview
P-side interface presence test
interface (6X50) cards entered for the LGC/LTC are present. The P-side
interface test arranges the following P-side loop test. The P-side interface test
terminates when a failed 6X50 card is detected or removed. The diagnostic
returns a No Resources error and produces a PM181 log report.
P-side loop test
6X50 cards and other dedicated P-side loop-around circuits for the LTC. The
P-side interface test checks for the presence of all 6X50 cards. A description
of P-side interface cards supported in the LTC P-side loop test follows.
When the LTC is in inactive mode, the P-side loop test checks only 6X48
P-side loops. Inactive mode occurs when one unit is inactive and the other unit
is ManB, SysB or InSv. When the LTC is in active mode, 6X48 and 6X50
P-side loops are tested. Active mode occurs when one unit is active and the
other unit is SysB, ManB or InSv. The P-side interface test also checks the
LTC multiplexer.
Internal loop test
When the LTC is out-of-service (OOS), a full test on every channel is run.
When the LTC is InSv, the test checks two speech channels selected at random.
The internal loop test checks the operation of LTC PCM enable/disable gates.
LTC P-side link diagnostic
The P-side link diagnostic consists of three separate tests:
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•
•
Hardware presence test
time switch (6X44) cards in the LTC or LGC. These cards are necessary for
the other P-side link diagnostic tests to run. When any of these cards are not
present, the diagnostic returns a No Resources error message. When this
event occurs, the diagnostics produces a PM181 log report.
P-side interface presence test
speech path diagnostic. This test makes sure that all LTC P-side links to test
are present. This test flags missing or failed 6X48 or 6X50 cards in the LTC.
297-8361-550 Standard 04.02 December 2004
. The P-side loop test checks for the correct operation of
hardware presence test
P-side interface presence test (DS30A and DS-1 link interfaces)
full peripheral test
. This test makes sure that DS-1
This test checks the integrity of LTC speech channels.
This test checks for the message (6X69) and
This test is the same as that in the