Avaya Media Gateway G700 User Manual

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.

Note:

For G700 or G350 Media Gateway systems, the channel service unit (CSU) is 
integrated within the MM710 Media Module. This means that there is no need for 
a separate external device. The loopback jack isolates the MM710 internal CSU 
from the DC power and properly loops the DC span power. 

This section covers:

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You can use one of two installation options:

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Use one of the following installation methods:

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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.

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