Avaya CMC1 사용자 설명서

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 to provide maximum coverage for loopback jack tests. Refer to 

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, or from the MM710, 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.

1. At the management terminal, enter 

, where 

 is the DS1 

interface circuit pack corresponding to the loopback jack.

2. Be sure the near-end CSU type is set to integrated.

3. On page 2 of the form, change the supply CPE loopback jack power field to y. 

Setting this field to y informs the technician that a loopback jack is present on the facility 
and allows the technician to determine that the facility is available for remote testing.

4. Enter 

 to save the new information.

The loopback jack and smart jack isolate faults by dividing the DS1 span into 3 sections (see 

 through 

●

From the 120A2 (or later) ICSU to the loopback jack

●

From the loopback jack to the smart jack (network interface point)

●

From the smart jack to the CO

The first two sections are your responsibility. The last is the responsibility of the DS1 service 
provider.