Loopback testing with a smart jack

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

10.

Central office

 

(up to 1000 ft. [305 m])

11.

Dumb block to smart jack RJ-48

Figure 28. Network interface at extended demarcation point (smart jack accessible) for a 120A2 (or later) ICSU

555-233-116

Issue 4 October 2002 149

Page 149
Image 149
Avaya 555-233-116 manual Issue 4 October 2002