Install DS1 CPE Loopback Jack (T1 Only)
Issue 4 May 2002
5-65555-233-123
Figure 5-12. 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” Block (Extended Demarcation)
8. Network Interface Smart Jack
9. Interface Termination or Fiber MUX
10. Central Office
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