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Maintenance Objects
1834
Issue 5 October 2002
CPE Loopback Jack Test (#1212)
This test is destructive.
The CPE Loopback Jack (CLJ-LB) Test causes a loopback at the CPE Loopback
Jack and tests the building wiring connection between the UDS1-BD DS1 board
and the CPE Loopback Jack.
The test is highly destructive and can only be initiated by a system technician
demanded test ds1-loop UUCSS cpe-loopback-jack-test-begin
[number-of-bits bit-pattern] command. The System technician has the choice of
entering a loopback activation code on the command line or using the default
code 0x47F.
All trunks or ports on the UDS1 Interface circuit pack must be busied out using the
system technician busyout board command before running the CPE Loopback
Jack Test.
The CPE Loopback Jack Test has the UDS1 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 or abort.
The status of the CPE Loopback Jack test is available in the hardware error log
via Error Type 3900. Several distinct Aux values give the user information on 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 UUCSS end-loopback/span-test
command or the release board command. Using the release board command
will restore all trunks or ports on the UDS1 Interface circuit pack to the in-service
state.