Avaya 555-233-116 - Manual (Page 149)

Loopback testing with a smart jack
Issue 4 October 2002 149 555-233-116
Figure 28. Network interface at extended demarcation point (smart jack accessible) for a
120A2 (or later) ICSU
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])
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