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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-336CO-TRK (CO Trunk)
10
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.
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.
c. ATMS test are not part of either sequence. They are run either on demand
with the test analog-testcall command or via the ATMS schedule.
Dial Tone Test (#0)
This test attempts to seize a port and checks for the return of a dial tone.
1. D = Destructive; ND = Nondestructive
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
NPE Crosstalk Test (#6) X ND
Dial Tone Test (#0) X ND
CO Demand Diagnostic Test (#3) (a) X X ND
Loop Around and Conference Test (#33) X ND
Audit Update Test (#36)
Analog Transmission Test (#844-848) (b)
X
(c)
X
(c)
ND