User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-578DS1-BD (DS1 Interface Circuit Pack)
10
if the 120A CSU Module is present, administered, and connected to a 1.544
Mbps TN767E 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 PCSS ds1/csu-loopback-tests 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 RLB Test.
When the RLB Test is initiated, maintenance software sends an appropriate
message to the TN767E DS1 Interface circuit pack to start the test. The board will
set up the RLB loopback, transmit a test pattern, and verify that the pattern is
received unaltered through the loopback. If the transmitted and received pattern
is different, the test fails.
In addition, the DS1 circuit pack hardware applies a DC current while the test is
running in order to detect any broken wires which may not be detected by the
loopback pattern.
When the test is complete, all trunks or ports on the TN767E DS1 Interface circuit
pack are restored to the in-service state after the release board command is
entered
Table 10-161. TEST #1211 CSU Repeater Loopback Test
Error
Code
Test
Result Description/ Recommendation
ABORT Internal system error
1. Retry test ds1-loop PCSS ds1/csu-loopback-tests at 1-minute intervals
a maximum of 5 times.
1005 ABORT CSU Repeater Loopback Test cannot be executed in the current
configuration. To run this test, the
Near-End CSU Type field on the DS1circuit
pack administration form must be set to
integrated and the "Bit Rate" field on
the DS1 circuit pack administration form must be set to "1.544" (24-channel
configuration).
1. Use the change ds1 PCSS command to set the
Near-End CSU Type field
on the DS1 circuit pack administration form to
integrated , and/or change
the "Bit Rate" field to "1.544" if the board is to be used in 24-channel
configuration.
2. Retry test ds1-loop PCSS ds1/csu-loopback-tests.
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