Rj-21 Cable Pinouts - Cisco Catalyst 2950 Hardware Installation Manual

Appendix B Connectors and Cables

RJ-21 Cable Pinouts

78-11157-05
Figure B-13 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and
1000BASE-T GBIC Module Ports
Switch
1 TPO+
2 TPO-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Table B-1 lists the RJ-21 cable pinouts on the Catalyst 2950ST-24 LRE and
Catalyst 2950ST-24 LRE 997 switches.
Table B-2 lists the RJ-21 cable pinouts on the Catalyst 2950ST-8 LRE switches.
Table B-1 RJ-21 Cable Pinouts on the Catalyst 2950ST-24 LRE and
Catalyst 2950ST-24 LRE 997 Switches
Function Pin Pin
Port 1 Tip 1 26
Port 2 Tip 2 27
Port 3 Tip 3 28
Port 4 Tip 4 29
Port 5 Tip 5 30
Port 6 Tip 6 31
Port 7 Tip 7 32
Port 8 Tip 8 33
Port 9 Tip 9 34
Catalyst 2950 Desktop Switch Hardware Installation Guide
Switch
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Function
Port 1 Ring
Port 2 Ring
Port 3 Ring
Port 4 Ring
Port 5 Ring
Port 6 Ring
Port 7 Ring
Port 8 Ring
Port 9 Ring
Cable and Adapter Specifications
B-11