Avaya CMC1 manual Testing a loopback jack without a smart jack

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	6.	Dumb block (extended demarcation)
2.	Span section 2	7.	Loopback jack
3.	Span section 3	8.	Network interface smart jack
4.	120A2 (or later) ICSU	9.	Interface termination or fiber multiplexer (MUX)
5.	RJ-48 to network interface (up	10.	Central office
	to 1000 ft. [305 m])	11.	Dumb block to smart jack RJ-48

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 Figure 106.

334 Installation, Upgrades and Additions for Avaya CMC1 Media Gateways