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DS1/T1 CPE loopback jack
Issue 9.1 June 2006 419
DS1/T1 CPE loopback jack
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:
Note: Do not remove the loopback jack after installation. It should always be available
for remote tests of the DS1 span.
Note:
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:
● Installing a loopback jack on page 419
● Administering a loopback jack on page 421
● Testing a loopback jack with a smart jack on page 421
● Testing a loopback jack without a smart jack on page 430
● Configurations using fiber multiplexers on page 433
Installing a loopback jack
You can use one of two installation options:
● Installing a loopback jack with a smart jack on page 419
● Installing a loopback jack without a smart jack on page 420
Installing a loopback jack with a smart jack
Use one of the following installation methods:
● 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.