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DS1-BD (DS1 Interface Circuit Pack)
Issue 5 October 2002
1127
555-233-119
The CPE Loopback Jack Test has the TN767E DS1 Interface circuit pack transmit
a loopback activation code to the CPE Loopback Jack, waits up to 10 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 to indicate that the pattern was successfully sent. If the
loopback is not established within the 10 seconds, the test returns FAIL.
The status of the CPE Loopback Jack test will be available in the hardware error
log via error type 3900. 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 (3-in-24 Pattern) is synchronized (Synchronized Field).
To terminate the test, enter the test ds1-loop UUCSS end-loopback/span-test
command.
Table 239. TEST #1212 CPE Loopback Jack Test
Error
Code Test
Result Description/ Recommendation
ABORT Internal system error
1. Retry test ds1-loop UUCSS cpe-loopback-jack-test-begin at 1-minute
intervals a maximum of 5 times.
1005 ABORT CPE Loopback Jack Test cannot be executed in the current configuration. To
run this Test, 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.
1015 ABORT Ports on the DS1 Interface circuit pack have not been busied out to
out-of-service.
1. Enter the busyout board UUCSS command to put all trunks or ports of
the DS1 Interface circuit pack into the out-of-service state.
2. Retry the command.
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