Avaya 555-233-116 - Manual (Page 145)

Loopback testing with a smart jack
Issue 4 October 2002 145 555-233-116
Figure 24. Network interface at smart jack 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. Loopback jack
7. Network interface smart jack
8. Interface termination or fiber multiplexer (MUX)
9. Central office