Four Twisted-Pair Cable Pinouts For 1000Base-T Ports; Rj-21 Cable Pinouts - Cisco WS-C2950T-48-SI Hardware Installation Manual

Cable and Adapter Specifications

Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports

Figure B-14
Catalyst 2950T-24 switches, Catalyst 2950 LRE switches, and 1000BASE-T GBIC module ports.
Figure B-14 Four Twisted-Pair Straight-Through Cable Schematic for 10/100/1000 and 1000BASE-T
Switch
1 TPO+
2 TPO-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Figure B-15 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and 1000BASE-T GBIC
Switch
1 TPO+
2 TPO-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-

RJ-21 Cable Pinouts

Table B-1
997 switches.
Table B-1
Function
Port 1 Tip
Port 2 Tip
Port 3 Tip
Port 4 Tip
Catalyst 2950 Switch Hardware Installation Guide
B-8
and Figure B-15 show the schematics of four twisted-pair cables for 10/100/1000 ports on
GBIC Module Ports
Router or PC
1 TP1+
2 TP1-
3 TPO+
6 TPO-
4 TP3+
5 TP3-
7 TP2+
8 TP2-
Module Ports
Switch
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
lists the RJ-21 cable pinouts on the Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE
Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE 997 Switch RJ-21 Cable Pinouts
Pin Pin Function
1 26 Port 1 Ring
2 27 Port 2 Ring
3 28 Port 3 Ring
4 29 Port 4 Ring
Appendix B Connectors and Cables
OL-6156-01