Avaya Definity SI Maintenance Manual page 1230

Maintenance Object Repair Procedures
3. At the administration terminal, busyout the affected port, and run a Long
Test Sequence. If CO Demand Diagnostic Test #3 passes and this error
keeps occurring, refer problems to CO. Release the port.
4. If the error count associated with this error type is very high (that is, 255)
and all tests pass, then either the reverse current detector is defective or
the CO line is noisy. If the CO line is suspected, Tip and Ring observations
should be made. If the line is determined to be noisy, the problem should
be referred to the CO. If the reverse current detector is defective, ignore
this error.
System Technician-Demanded Tests: Descriptions
and Error Codes
Always investigate tests in the order they are presented in the table below when
inspecting errors in the system. By clearing error codes associated with the NPE
Crosstalk Test, for example, you may also clear errors generated from other tests
in the testing sequence.
For example, you may also clear errors generated from other tests in the testing
sequence.
Order of Investigation
NPE Crosstalk Test (#6)
Dial Tone Test (#0)
CO Demand Diagnostic Test (#3) (a)
Loop Around and Conference Test (#33)
Audit Update Test (#36)
Analog Transmission Test (#844-848) (b)
1 D = Destructive; ND = Nondestructive
Notes:
a. A demand test of Diagnostic Test (#3) always returns a PASS indication for
CO-TRK/CO-BD [TN747B] version 8 or greater. However, any errors
produced as a result of this test are logged and produce no alarms.
If errors logged by Test #3 are the only complaints against this trunk, then
the system technician person should check if MFT/Range Extenders are
being used. If extenders are present, then there is a good chance that
there is excessive loop current, which causes Test #3 to log errors.
However, all else being normal, these errors should not affect the
customer.
b. Refer to TIE-TRK (Tie Trunk) Maintenance documentation for a description
of this test.
10-444 Issue 4 May 2002
Short Test Long Test
Sequence Sequence
X
X
X X
X
X X
(c) (c)
1
D/ND
ND
ND
ND
ND
ND
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