Avaya S8700 Maintenance Manual page 189

DS1 CPE Loopback Jack (T1 Only)
Installation
To install the loopback jack:
1. Disconnect the RJ-48 (8-wide) connector (typically an H600-383 cable) at
the appropriate interface point and connect the loopback jack in series with
the DS1 span. See
5-12.
2. Plug the H600-383 cable from the ICSU into the female connector on the
loopback jack.
3. Plug the male connector on the loopback jack cable into the network
interface point.
Administration
1. At the management terminal, enter change ds1 location (the DS1
Interface circuit pack for which the loopback jack was installed).
2. Be sure the near-end CSU type is set to integrated.
3. On page 2 of the form, change the supply CPE loopback jack
power field to y.
4. Enter save translation to save the new information.
DS1 Span Test
This test should only be performed after the DS1 circuit pack and the 120A2 (or
later) ICSU have been successfully tested using appropriate maintenance
procedures. The DS1 span test consists of 2 sequential parts. Each part
provides a result indicating if there is a problem in the CPE wiring. CPE wiring
may be considered problem-free only if the results of both parts are successful.
The first part of the span test powers-up the loopback jack and attempts to send a
simple code from the DS1 board, through the wiring and loopback jack, and back
to the DS1 board. Maintenance software waits about 10 seconds for the loopback
jack to loop, sends the indication of the test results to the management terminal,
and proceeds to the second part of the test.
555-233-143
Figure 5-1 on page 5-8
NOTE:
Do not remove the loopback jack after installation. This is not a test
tool and should always be available to remotely test a DS1 span.
NOTE:
Setting this field to y informs the technician that a loopback jack is
present on the facility. This allows a technician to determine that the
facility is available for remote testing.
through Figure 5-5 on page
Issue 1 May 2002 5-3