DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Additional Maintenance Procedures
6-17DS1 CPE Loopback Jack (T1 Only)
6
Figure 6-2. Network Interface at Extended Demarcation Point (Smart Jack
Inaccessible)
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. Loopback Jack
7. “Dumb” Bloc k (Extended Demarcation)
8. Network Interface Smart Jack
9. Interface Termination or Fiber MUX
10. Central Office