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 Demarcat ion Point (Smart Jack
Accessible)
Configurations Without a Smart Jack
When the loopback jack is a dded to a spa n 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 jac k 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” Bloc k (Extended Demarcation)
7. Loopbac k Jack
8. Network Interface Smart Jack
9. Interface Termination or Fiber MUX
10. Central Office
11. “Dumb” Block to Smart Jack RJ-48