Avaya CMC1 사용자 설명서

This section provides information on how to install and use a DS1 loopback jack to test the DS1 
span between the Avaya Media Server or Gateway and the network interface point. The 
loopback jack is required when DC power is at the interface to the integrated channel service 
unit (ICSU).

Note:

Do not remove the loopback jack after installation. It should always be available 
for remote tests of the DS1 span.

For earlier media gateway systems, the integrated channel service unit (ICSU) — also known 
as the 120A2 — is a separate device that plugs into the back of the media gateway. 

You can install a loopback jack with or without a smart jack.

Install the loopback jack at the interface to the smart jack, if possible. This position provides 
maximum coverage of CPE wiring when remote loopback tests are run.

If the smart jack is not accessible, install the loopback jack at the extended demarcation point.

If there is no extended demarcation point, install the loopback jack directly at the network 
interface point as shown in 

If there is an extended demarcation point and the smart jack is not accessible, install the 
loopback jack as shown in 

.

If there is an extended demarcation point, but the smart jack is accessible, install the loopback 
jack as shown in 

.

1. To install the loopback jack, simply disconnect the RJ-48 (8-wide) connector at the 

appropriate interface point and connect the loopback jack in series with the DS1 span. See 

 through 

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.

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.