Additional maintenance procedures
DS1 CPE loopback jack (T1 only)
Maintenance Procedures
363
December 2003
Figure 109: Network Interface at Extended Demarcation Point (Smart Jack accessible)
Configurations without a Smart Jack
When the loopback jack is added to a span that does not contain a smart jack, the span is divided into two
sections. See
Figure 110, Network Interface at “Dumb” Block, on page 364
and
Interface at “Dumb” Block with repeater line to Fiber MUX, on page 365
. These sections are described in
Table 86, DS1 span section descriptions (without a Smart Jack),
Figure notes
1
Span Section 1
6
“Dumb” Block (Extended Demarcation)
2
Span Section 2
7
Loopback Jack
3
Span Section 3
8
Network Interface Smart Jack
4
120A2 (or later) Integrated
Channel Service Unit (ICSU)
9
Interface Termination or Fiber MUX
5
RJ-48 to Network Interface (up
to 1000 Feet) (305 m)
10
Central Office
11
“Dumb” Block to Smart Jack RJ-48
Table 86: DS1 span section descriptions (without a Smart Jack)
Span section
Smart Jack location
Span Section
1:
ICSU to the loopback jack
Span Section
2:
Loopback jack to the CO)
Summary of Contents for CMC1
Page 1: ...Maintenance Procedures 555 245 103 Issue 1 1 December 2003 ...
Page 14: ...Contents 14 Maintenance Procedures December 2003 ...
Page 416: ...Additional maintenance procedures IP Telephones 416 Maintenance Procedures December 2003 ...
Page 426: ...Index X 426 Maintenance Procedures December 2003 ...