Analog Voice RJ-21 Pinouts
Pair
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Cisco VG310 and Cisco VG320 Voice Gateways Hardware Installation Guide
78
Ring Conductor
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Cable Specifications and Information
Tip Conductor
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
OL-31292-01