DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-81Install DS1 CPE Loopback Jack (T1 Only)
1
Figure 1-24. Network Interface at “Dumb” Block
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)
5. Loopback Jac k
6. “Dumb” Bloc k (Demarcation Point)
7. Interface Termination or Fiber MUX
8. Central Office