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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
3.5.8 Contact Assignments of various types of connectors
The contact assignments of various types of connectors are described in this clause.
3.5.8.1
RJ21 type connectors
The contact assignments of RJ21 type (25-pair Amphenol) connectors
Figure 3.5.8.1
3.5.8.2
Miniature 6-position jack
The contact assignments of miniature 6-position jack registered in FCC.
Figure 3.5.8.2
50
25
28
3
27
2
26
1
a. Female connector
Contact assignments of RJ21 type connectors
1 2 3 4 5 6
Contact assignments of miniature 6-position jack
26
27
28
50
b. male connector
T2
R1
T1
R2
133
1
2
3
25
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