Testing A Loopback Jack Without A Smart Jack - Avaya CMC1 Installation, Upgrades And Additions

Adding or Removing Hardware
Figure 104: Network interface at extended demarcation point (smart jack accessible) for a
120A2 (or later) ICSU
Figure notes:
1. Span section 1
2. Span section 2
3. Span section 3
4. 120A2 (or later) ICSU
5. RJ-48 to network interface (up
to 1000 ft. [305 m])

Testing a loopback jack without a smart jack

When the loopback jack is added to a span that does not contain a smart jack, the span is
divided into 2 sections: from the ICSU to the loopback jack and from the loopback jack to the
central office (CO). Section 2 includes the short cable from the loopback jack to the dumb block
demarcation point (part of the loopback jack). This cable is the only part of Section 2 that is part
of customer premises wiring. It is not covered in the loopback jack's loopback path. See
Figure 105 and
334 Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
Figure 106.
6. Dumb block (extended demarcation)
7. Loopback jack
8. Network interface smart jack
9. Interface termination or fiber multiplexer (MUX)
10. Central office
11. Dumb block to smart jack RJ-48