DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Additional Maintenance Procedures
6-18DS1 CPE Loopback Jack (T1 Only)
6
Figure 6-3. Network Interface at Extended Demarcation Point (Smart Jack
Accessible)
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. Loopback Jack
8. Network Interface Smart Jack
9. Interface Termination or Fiber MUX
10. Central Office
11. “Dumb” Block to Smart Jack RJ-48