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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-1508UDS1-BD (UDS1 Interface Circuit Pack)
10
The test is destructive and can only be initiated by a system technician
demanded
test ds1-loop PCSS far-csu-loopback-test-begin
command.
All trunks or ports on the UDS1 Interface circuit pack must be busied out via the
system technician busyout board command before running the Far CSU
Loopback Test.
If the far-end CSU is not an AT&T 120A1 CSU Module, and the UDS1 is
administered for ami-zcs line coding, one’s density protection must be disabled
on the CSU during the test due to the large number of zero’s in the 3-in-24 test
pattern.
The Far CSU Loopback Test has the TN464F UDS1 Interface circuit pack
transmit a loopback activation code to the remote CSU, waits up to 15 seconds
for return of the code to verify the loopback has been established, transmits a
framed 3-in-24 test pattern, begins counting bit errors in the received test
pattern, and returns a PASS result. If the loopback is not established within the 15
seconds, the test fails.
The status of the Far CSU Loopback test will be available in the hardware error
log via error type 3901. Several distinct aux values will be used to give the user
information of the status of the test.
The
list measurements ds1 summary
command will display the length of time the
test has been running (
Test Duration
field) and number of bit errors detected
(
Loopback/Span Test Bit-Error Count
field). If the test pattern is being passed
through the loopback cleanly, the number of bit errors should be very low. The
command will also display the type of Loopback/Span test executing (
Test
field),
the type of pattern generated for the Loopback/Span test (
Pattern
field),and
whether the pattern(
i.e.
3-in-24
Pattern
) is synchronized (
Synchronized
field).
To terminate the test, enter the
test ds1-loop PCSS end-loopback/span-test
command or the release board command. Using the release board command
will restore all trunks or ports on the TN464F UDS1 Interface circuit pack to the
in-service state.
Table 10-507. TEST #1213 Far CSU Loopback Test
Error
Code
Test
Result Description/ Recommendation
ABORT Internal System Error
1. Retry the
test ds1-loop PCSS far-csu-loopback-test-begin
command at
1-minute intervals a maximum of 5 times.
2. If the test continues to abort, escalate the problem.
Continued on next page