DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Additional Maintenance Procedures
6-20DS1 CPE Loopback Jack (T1 Only)
6
Figure 6-5. Network Interface at “Dumb” Block with Repeater Line to Fiber
MUX
Section 2 includes the short c able from the loopbac k jack to the “dumb ” block
demarcation point (p art of the loopback jac k). This is the only portion o f section
2 that is part of customer premise s wiring but is not covered in t he loopback
jack’s loopbac k path.
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 Jack
6. “Dumb” Block (Demarcation Point)
7. Repeater
8. Fiber MUX
9. Central Office