Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 215

Chapter 16 Connecting High-Density Analog Telephony Network Modules
Figure 16-7 RJ-21 Connector Wiring
RJ-21 cable
Table 16-4 RJ-21 Connections for the High-Density Analog Voice Network Module
Pair
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
OL-2485-20
1
26
RJ-21 connector
RJ-21 Connector
Tip Conductor Ring Conductor
26 1
27 2
28 3
29 4
30 5
31 6
32 7
33 8
34 9
35 10
36 11
37 12
38 13
39 14
40 15
41 16
42 17
43 18
44 19
45 20
46 21
47 22
48 23
49 24
50 25
25
50
NM-HDA
Port Network Module Reference
0 FXS
1 FXS
2 FXS
3 FXS
4 FXS
5 FXS
6 FXS
7 FXS
8 FXS
9 FXS
10 FXS
11 FXS
12 Unused
13 Unused
14 FXS
15 FXS
16 FXS
17 FXS
18 FXS
19 FXS
20 FXS
21 FXS
22 Unused
23 Unused
— Unused
Cisco Network Modules Hardware Installation Guide
High-Density Analog Voice Card Pinouts
Base card
FXO Expansion
board in
FXO
slot 0
FXO
FXO
Unused
Unused
Unused
Unused
Unused
FXO failover
FXO Expansion
board in
FXO
slot 1
FXO
FXO
Unused
Unused
Unused
Unused
Unused
FXO failover
16-7