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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-521DS1-BD (DS1 Interface Circuit Pack)
10
CSU Equipment Loopback Test (#1210)
This test is destructive.
The CSU Equipment Loopback (ELB) Test causes a loopback at the near-edge
of the local 120A CSU Module and tests the connection from the TN767E DS1
board to the CSU Module (DS1 board edge interconnecting cable, and CSU
Module edge). This test will only be performed if the 120A CSU Module is
present, administered, and connected to a 1.544Mbps 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 ELB Test.
When the ELB Test is initiated, maintenance software sends an appropriate
message to the TN767E DS1 Interface circuit pack to start the test. The board
sets up the ELB 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.
0NO
BOARD
The test could not relate the internal ID to the port (no board).
This could be due to incorrect translations, no board is inserted, an incorrect
board is inserted, or an insane board is inserted.
1. Check to ensure that the board translations are correct. Use the add ds1
PCSS command to administer the DS1 interface if it is not already
administered.
2. If board was already administered correctly, check the error log to
determine if the board is hyperactive. If this is the case, the board is shut
down. Reseating the board will re-initialize the board.
3. If the board was found to be correctly inserted in step 1, issue the busyout
board command.
4. Issue the reset board command.
5. Issue the release busy board command.
6. Issue the test board long command.
This should re-establish the link between the internal ID and the port.
Table 10-174. TEST #1209 DS1 Board Loopback Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page