Testing A Loopback Jack Without A Smart Jack - Avaya CMC1 Installation Manual

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 113: Network interface at "dumb" block for a 120A2 (or later) ICSU
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])
Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
June 2004
Figure 113 and
5 Loopback jack
6 Dumb block (demarcation point)
7 Interface termination or fiber multiplexer (MUX)
8 Central office
Adding or Removing Hardware
Install DS1/T1 CPE loopback jack
Figure 114.
311