Avaya DEFINITY Server CSI Maintenance Manual page 1830

Maintenance Objects
CSU Repeater Loopback Test (#1211)
This test is destructive.
The CSU Repeater Loopback (RLB) Test causes a loopback at the far-edge of the
local 120A1 CSU Module or the 401A T1 Sync Splitter and tests the connection
from the DS1 board to and including the CSU Module/T1 Sync Splitter circuitry.
This test is only performed if the 120A1 CSU Module or the 401A T1 Sync Splitter
is present, administered, and connected to a 1.544 Mbps DS1 circuit pack on the
back of the port carrier.
The test is destructive and can only be initiated by a system technician demanded
test ds1-loop UUCSS ds1/csu-loopback-tests command.
All trunks or ports on the UDS1 Interface circuit pack must be busied out using the
system technician busyout board command before running the RLB Test.
When the RLB Test is initiated, maintenance software sends an appropriate
message to the UDS1 Interface circuit pack to start the test. The board sets up the
RLB loopback, transmits a test pattern, and verifies that the pattern is received
unaltered through the loopback. If the transmitted and received pattern is
different, the test fails.
When the test is complete, all trunks or ports on the UDS1 Interface circuit pack
are restored to the in-service state after the release board command is entered.
Table 541. TEST #1211 CSU Repeater Loopback Test
Error Test
Code Result
ABORT Internal system error
1005 ABORT CSU Repeater Loopback Test cannot be executed in the current
configuration. To run this test, the
DS1Circuit Pack administration form must be set to
Bit Rate
1.544
1830
Issue 5 October 2002
Description/ Recommendation
1. Retry the test ds1-loop UUCSS ds1/csu-loopback-tests command at
1-minute intervals a maximum of 5 times.
field on the DS1 Circuit Pack administration form must be set to
(24-channel configuration).
1. Use the change ds1 UUCSS command to set the
Type field on the DS1 Circuit Pack administration form to
, and/or change the
integrated
board is to be used in 24-channel configuration.
2. Retry the test ds1-loop UUCSS ds1/csu-loopback-tests command.
Near-End CSU Type
integrated
Near-End CSU
field to
Bit Rate
Continued on next page
field on the
and the
if the
1.544