Cisco 2950 Hardware Installation Guide - Page 106

Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, RJ-21 Cable Pinouts

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Cable and Adapter Specifications Appendix B Connectors and Cables Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports Figure B-14 and Figure B-15 show the schematics of four twisted-pair cables for 10/100/1000 ports on 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 GBIC Module Ports Switch 1 TPO+ 2 TPO3 TP1+ 6 TP1- Router or PC 1 TP1+ 2 TP13 TPO+ 6 TPO- 4 TP2+ 5 TP27 TP3+ 8 TP3- 4 TP3+ 5 TP37 TP2+ 8 TP2- 65272 Figure B-15 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and 1000BASE-T GBIC Module Ports Switch 1 TPO+ 2 TPO3 TP1+ 6 TP1- Switch 1 TP0+ 2 TP03 TP1+ 6 TP1- 4 TP2+ 5 TP27 TP3+ 8 TP3- 4 TP2+ 5 TP27 TP3+ 8 TP3- 65274 RJ-21 Cable Pinouts Table B-1 lists the RJ-21 cable pinouts on the Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE 997 switches. Table B-1 Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE 997 Switch RJ-21 Cable Pinouts Function Port 1 Tip Port 2 Tip Port 3 Tip Port 4 Tip Pin Pin Function 1 26 Port 1 Ring 2 27 Port 2 Ring 3 28 Port 3 Ring 4 29 Port 4 Ring Catalyst 2950 Switch Hardware Installation Guide B-8 OL-6156-01

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B-8
Catalyst 2950 Switch Hardware Installation Guide
OL-6156-01
Appendix B
Connectors and Cables
Cable and Adapter Specifications
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure B-14
and
Figure B-15
show the schematics of four twisted-pair cables for 10/100/1000 ports on
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
GBIC Module Ports
Figure B-15
Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and 1000BASE-T GBIC
Module Ports
RJ-21 Cable Pinouts
Table B-1
lists the RJ-21 cable pinouts on the Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE
997 switches.
1
TPO+
2
TPO-
3
TP1+
6
TP1-
1
TP1+
Switch
Router or PC
2
TP1-
3
TPO+
6
TPO-
4
TP2+
5
TP2-
7
TP3+
8
TP3-
4
TP3+
5
TP3-
7
TP2+
8
TP2-
65272
1
TPO+
2
TPO-
3
TP1+
6
TP1-
1
TP0+
Switch
Switch
2
TP0-
3
TP1+
6
TP1-
4
TP2+
5
TP2-
7
TP3+
8
TP3-
4
TP2+
5
TP2-
7
TP3+
8
TP3-
65274
Table B-1
Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE 997 Switch RJ-21 Cable Pinouts
Function
Pin
Pin
Function
Port 1 Tip
1
26
Port 1 Ring
Port 2 Tip
2
27
Port 2 Ring
Port 3 Tip
3
28
Port 3 Ring
Port 4 Tip
4
29
Port 4 Ring