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1151

DEFINITY ECS Release 8.2 Maintenance for R8.2csi

555-233-119 Issue 1

April 2000

Maintenance Objects

3-596DS1-BD (DS1 Interface Circuit Pack)

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 or T1 Sync Spilitter, and tests the connection from the

TN767E DS1 board to the CSU Module/T1 Sync Splitter (DS1 board edge

interconnecting cable, and CSU Module/T1 Sync Splitter edge). This test will only

be performed if the 120A CSU Module/T1 Sync Splitter 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 UUCSS 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

UUCSS 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 3-248. TEST #1209 DS1 Board Loopback Test — Continued

Error

Code

Test

Result Description/ Recommendation

Continued on next page