Avaya S8700 Maintenance Manual page 197

DS1 CPE Loopback Jack (T1 Only)
Configurations 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 two sections. See
1. ICSU to the loopback jack.
2. Loopback jack to the CO.
Figure Notes
1. Span Section 1
2. Span Section 2
3. 120A2 (or later) Integrated
Channel Service Unit (ICSU)
4. RJ-48 to Network Interface
(Up to 1000 Feet) (305 m)
Figure 5-4. Network Interface at "Dumb" Block
555-233-143
Figure 5-4 and Figure 5-5 on page
5. Loopback Jack
6. "Dumb" Block (Demarcation Point)
7. Interface Termination or Fiber MUX
8. Central Office
Issue 1 May 2002
5-12.
5-11