Adding or Removing Hardware
Install DS1/T1 CPE loopback jack
312
Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
June 2004
Figure 114: Network interface at “dumb” block with repeater line to fiber MUX for a 120A2
(or later) ICSU
Proceed as follows.
1
Test customer premises wiring from the ICSU to the loopback jack, as described in the “DS1 Span
Test” section.
2
Test the loopback jack-to-dumb block and dumb block-to-CO wiring (section 2 in
Figure 113
and
Figure 114
). This can be done using a loopback that “overlaps” the section of the span. Any of the
following loopbacks can do this:
•
The local ICSU’s line loopback, which the DS1 service provider at the CO end typically
activates, tests, and then deactivates.
•
The local DS1 interface’s payload loopback, which the DS1 service provider at the CO
end activates and tests.
Figure notes
1
Span section 1
2
Span section 2
3
120A2 (or later) ICSU
4
RJ-48 to network
interface (up to 1000 ft.
[305 m])
5
Loopback jack
6
Dumb block (demarcation point)
7
Repeater
8
Fiber multiplexer (MUX)
9
Central office
