Cisco Catalyst 2950 Hardware Installation Manual page 159

Appendix B Connectors and Cables
Table B-2
Function
Port 1 Tip
Port 2 Tip
Port 3 Tip
Port 4 Tip
Port 5 Tip
Port 6 Tip
Port 7 Tip
Port 8 Tip
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
No connect
78-11157-05
RJ-21 Cable Pinouts on the Catalyst 2950ST-8 LRE Switches
Pin Pin Function
1 26 Port 1 Ring
2 27 Port 2 Ring
3 28 Port 3 Ring
4 29 Port 4 Ring
5 30 Port 5 Ring
6 31 Port 6 Ring
7 32 Port 7 Ring
8 33 Port 8 Ring
9 34 No connect
10 35 No connect
11 36 No connect
12 37 No connect
13 38 No connect
14 39 No connect
15 40 No connect
16 41 No connect
17 42 No connect
18 43 No connect
19 44 No connect
20 45 No connect
21 46 No connect
22 47 No connect
23 48 No connect
24 49 No connect
25 50 No connect
Catalyst 2950 Desktop Switch Hardware Installation Guide
Cable and Adapter Specifications
B-13