
Rack Installation
Connections from PSTN to backplane (slots 
Twisted  | 
  | Rack  | |
Pair  | Termination  | ||
  | Wire  | 
  | Card  | 
  | 
  | 
  | 
  | 
1  | Tip  | 
  | 0  | 
26  | Ring  | 
  | 
  | 
  | 0  | ||
5  | Tip  | 
  | 1  | 
30  | Ring  | 
  | 
  | 
  | 1  | ||
9  | Tip  | 
  | 2  | 
34  | Ring  | 
  | 
  | 
  | 2  | ||
Twisted
Pair
13
38
17
42
21
46
Rack
Termination
Wire Card
Tip 3
Ring 3
Tip 4
Ring 4
Tip 5
Ring 5