User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 7-9
Diagnostics & Troubleshooting
General Troubleshooting
General Troubleshooting
Use the functional block diagram below for general troubleshooting. The following sections provide
tests to aid in fault isolation.
Figure 7-1 General Troubleshooting Diagram
Framer
Microprocessor
High-Speed
Controller
Card A
4xDS1
or
3xE1
D C B A
Primary
DS3
(Working)
Secondary
DS3
(Protection)
Spare
Card
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Card
Position
1
2
3
4
5
6
7
Circuit
Number
Protection Group
4xDS1
or
3xE1
4xDS1
or
3xE1
4xDS1
or
3xE1
4xDS1
or
3xE1
4xDS1
or
3xE1
4xDS1
or
3xE1
Spare
Note: DS1 and E1 cards cannot be mixed.
E1 circuits use Protection Groups A, B, and C.
High-Speed
Controller
Card B
Trans-
ceiver
Framer
Microprocessor
Trans-
ceiver