DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-80Install DS1 CPE Loopback Jack (T1 Only)
1
Figure 1-23. Network Interface at Extended Demarcation Point (Smart Jack
Accessible)
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 Figure 1-24
and Figure 1-25.
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. Span Section 3
4. 120A2 (or later) Integrated
Channel Service Unit (ICSU)
5. RJ-48 to Network Interface
(Up to 1000 Feet) (305 m)
6. “Dumb” Block (Extended Demarcation)
7. Loopback Jack
8. Network Interface Smart Jack
9. Interface Termination or Fiber MUX
10. Central Office
11. “Dumb” Block to Smart Jack RJ-48