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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-72Install DS1 CPE Loopback Jack (T1 Only)
1
Loopback Jack Installation
Configurations Using a Smart Jack
The preferred location of the loopback jack is at the interface to the Smart Jack.
This provides maximum coverage of CPE wiring when remote tests are run using
the loopback jack. If the Smart Jack is not accessible, install the loopback jack at
the extended demarcation point.
1. If there is no extended demarcation point, install the loopback jack directly
at the network interface point as shown in Figure 1-21
.
2. If there is an extended demarcation point and the Smart Jack is not
accessible, install the loopback jack as shown in Figure 1-22
.
3. If there is an extended demarcation point, but the Smart Jack is
accessible, install the loopback jack as shown in Figure 1-23
.
Configurations Without a Smart Jack
1. Install the loopback jack at the point where the cabling from the ICSU
plugs into the “dumb” block. If there is more than one “dumb” block,
choose the one that is closest to the Interface Termination feed or the fiber
MUX. This provides maximum coverage for loopback jack tests. Refer to
Figure 1-24
and
Figure 1-25
.
Installation
1. To install the loopback jack, simply 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
Figure
1-21 through
Figure 1-25
.
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.
Administration
1. At the management terminal, enter
change ds1 <location>
. The
“location” is the DS1 interface circuit pack for which the loopback jack
was installed.
2. Be sure the “near-end CSU type” is set to
integrated
.