Pair telco connectors – Black Box COMPACT T1 User Manual
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Compact T1 - Release 6.1
Quick Start
Interface Connectors
25-Pair Telco Connectors
Tip and Ring Analog Interfaces equipped with standard 25-pair Telco Connectors
(female) for connection to key systems, fax machines, modems, and PBXs. These
interfaces are also used for ISDN BRI ports and are jumper selectable on the Quad T1
card.
Circuit connections are made at the 25-pair
telco connectors. A standard 25-pair
telephone cable with RJ-21X wiring and a
male D-type connector at the Unit end is
required.
The pinouts are as follows:
Pair
Pin Location
Function
Color Code
1
26
1
Tip Channel 1
Ring Channel 1
White/Blue
Blue/White
2
27
2
Tip Channel 2
Ring Channel 2
White/Orange
Orange/White
3
28
3
Tip Channel 3
Ring Channel 3
White/Green
Green/White
4
29
4
Tip Channel 4
Ring Channel 4
White/Brown
Brown/White
5
30
5
Tip Channel 5
Ring Channel 5
White/Slate
Slate/White
6
31
6
Tip Channel 6
Ring Channel 6
Red/Blue
Blue/Red
7
32
7
Tip Channel 7
Ring Channel 7
Red/Orange
Orange/Red
8
33
8
Tip Channel 8
Ring Channel 8
Red/Green
Green/Red
9
34
9
Tip Channel 9
Ring Channel 9
Red/Brown
Brown/Red
10
35
10
Tip Channel 10
Ring Channel 10
Red/Slate
Slate/Red
50
25
26
1