Additional Maintenance Procedures
555-233-143
5-12 Issue 1 May 2002
Figure 5-5. Network Interface at “Dumb” Block with Repeater Line to Fiber MUX
Section 2 includes the short cable from the loopback jack to the “dumb” block
demarcation point (part of the loopback jack). This is the only portion of section 2
that is part of customer premises wiring but is not covered in the loopback jack’s
loopback 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
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