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Install DS1/T1 CPE loopback jack
Issue 10 June 2005 331
Restoring DS1 administration
1. At the management terminal, open the DS1 administration form. Enter change ds1
UUCSS, where UU is the cabinet number, C is the carrier letter, and SS is the slot number of
the DS1 board.
2. Change to page 2 of the DS1 administration form.
3. Change the value of the TX LBO field to the original value that you wrote down when you
were Administering the DS1 for the test
on page 327.
4. Press ENTER to make the changes, CANCEL to quit without changes.
Releasing the DS1 circuit pack
1. Release the DS1 circuit pack. From the management terminal, enter release board
UUCSS, where UU is the cabinet number, C is the carrier letter, and SS is the slot number of
the DS1 board.
2. Leave the loopback jack in place.
Testing the DS1 span from the smart jack to the network interface
termination or fiber multiplexer (MUX)
1. Have the service provider run a smart-jack loopback test against the network interface
wiring that links the smart jack to the CO (section 3 in Figure 102
through Figure 104).
2. If the tests fails, there is a problem on the network side. Have the service provider correct it.
Testing the DS1 span from the loopback jack to
the smart jack
Test the short length of customer premises wiring between the loopback jack and the smart jack
(Section 2 in the following 3 figures) using a loopback that overlaps this section of the span.
● Have the DS1 service provider at the CO end run a local ICSU line loopback test.
● Have the DS1 service provider at the CO end run a local DS1 payload loopback test.
● Run a far-end ICSU line loopback, using the procedure below.
Note:
Note: This test cannot isolate the problem if there are problems in the wiring between
the far-end CO and the far-end ICSU. You must coordinate this test with the DS1
service provider.
1. From the management terminal, enter test ds1-loop UUCSS
far-csu-loopback-test-begin, where UU is the cabinet number, C is the carrier
letter, and SS is the slot number of the DS1 board.