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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-608DS1-BD (DS1 Interface Circuit Pack)
3
The test is destructive and can only be initiated by a system technician
demanded
test ds1-loop UUCSS far-csu-loopback-test-begin
command.
All trunks or ports on the DS1 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 a 120A CSU Module or a 401A T1 Sync Splitter, and the
DS1 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 TN767E DS1 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 (
Tes t
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
t
est ds1-loop UUCSS end-loopback/span-test
or
the
release board
command. Using the
release board
command will restore all
trunks or ports on the TN767E DS1 Interface circuit pack to the in-service state.
Table 3-252. TEST #1213 Far CSU Loopback Test
Error
Code
Tes t
Result Description/ Recommendation
ABORT Internal system error
1. Retry
t
est ds1-loop UUCSS far-csu-loopback-test-begin at 1-minute
intervals a maximum of 5 times.
1005 ABORT Far CSU Loopback Test cannot be executed in the current configuration. To run
this, the TN767E or later suffix DS1 must be administered for 24-channel
operation. The "Bit Rate" field on the DS1 circuit pack administration form must
be set to "1.544" for 24-channel operation.
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