Avaya DEFINITY Server CSI Maintenance Manual page 106

Maintenance for CSI systems
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 2 sections. See
1. ICSU to the loopback jack.
2. Loopback jack to the Central Office (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 12. Network Interface at "Dumb" Block
106
Issue 5 October 2002
Figure 12 and Figure 13 on page
5. Loopback Jack
6. "Dumb" Block (Demarcation Point)
7. Interface Termination or Fiber MUX
8. Central Office
107.
555-233-119