DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-621DS1-BD (DS1 Interface Circuit Pack)
9
Far CSU Loopback Test (#1213)
This test is destructive.
The Far CSU Loopback (R-LLB) Test causes a loopback at the far-end CSU and
tests all circuitry and facilities from the local TN767E DS1 board to the far-end
CSU.
The test is destructive and can only be initiated by a system technician
demanded
test ds1-loop UUCSS far-csu-loopback-test-begin
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 Far CSU
Loopback Test.
If the far-end CSU is not a 120A CSU Module, and the DS1 is administered for
ami-zcs line coding, one’s density protection must be disabled on the CSU
during the test due to the large number of zero’s in the 3-in-24 test pattern.
The Far CSU Loopback Test has the TN767E DS1 Interface circuit pack transmit
a loopback activation code to the remote CSU, waits up to 15 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
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 9-249. TEST #1212 CPE Loopback Jack Test — Continued
Error
Code
Tes t
Result Description/ Recommendation
Continued on next page
