Ds1/T1 Cpe Loopback Jack; Installing Loopback Jacks - Lucent Technologies DEFINITY Installation For Adjuncts And Peripherals

DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals 555-233-116
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DS1/T1 CPE Loopback Jack

Installing Loopback Jacks

DS1/T1 CPE Loopback Jack
This chapter provides information on how to install and use a DS1 loopback jack
to test the DS1 span between the DEFINITY and the network interface point. The
loopback jack is required when DC power is at the interface to the ICSU.
NOTE:
Do not remove the loopback jack after installation. It should always be
available for remote tests of the DS1 span.
The loopback jack isolates the ICSU from the DC power and properly loops the
DC span power.
NOTE:
The loopback jack operates with DS1 circuit packs and R7 or later
software. The loopback jack operates with the 120 integrated channel
service unit (ICSU) only. It does not support 3100-series channel service
units or other external CSUs or older ICSUs.
Installing Loopback Jacks
You can install a loopback jack with or without a smart jack.
With 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.
Issue 1
April 2000
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