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 c an only be initiated by a system technician
demanded test ds1-loop UUCSS far-csu-loopback-test-begin c ommand.
All trunks or ports on the DS1 Interface c ircuit pack must b e 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 c oding, one’s density p rotection must be
disabled on the CSU during the test due to the large numb er 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 acti vation code to the remote CSU, waits up to 15 second s for return
of the code to verify the loop back has been estab lished, transmits a framed
3-in-24 test pattern, beg ins counting bit errors in the rec eived 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 distinc t aux values will be used to g ive the user
information of the status of the test.
The
list measurements ds1 summary
command will disp lay the length of time the
test has been running (
Test Duration
field) and number of b it errors detected
(
Loopback/Span Test Bit-Error Count
field). If the test pattern is b eing passed
through the loopbac k cleanly, the number of bit errors should b e very low. The
command will also disp lay the type of loopb ack/span test executin g (
Tes t
field),
the type of pattern gener ated for the loopbac k/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 p ack to the in-service state.
Table 3-252. TEST #1213 Far CSU Loopback Test
Error
Code
Test
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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