C
ABLES
B-2
10BASE-T/100BASE-TX Pin Assignments
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for
RJ-45 connections: 100-ohm Category 3, 4 or 5 cable for 10 Mbps
connections or 100-ohm Category 5 cable for 100 Mbps connections. Also
be sure that the length of any twisted-pair connection does not exceed 100
meters (328 feet).
The RJ-45 ports on the switch support automatic MDI/MDI-X operation,
so you can use straight-through cables for all network connections to PCs
or servers, or to other switches or hubs. In straight-through cable, pins 1,
2, 3, and 6, at one end of the cable, are connected straight through to pins
1, 2, 3, and 6 at the other end of the cable. When using any RJ-45 port on
these switches, you can use either straight-through or crossover cable.
Note:
Auto-negotiation must be enabled for automatic MDI/MDI-X
pinout configuration.
Table B-1 10/100BASE-TX MDI and MDI-X Port Pinouts
Pin
MDI Signal Name
MDI-X Signal Name
1
Transmit Data plus (TD+)
Receive Data plus (RD+)
2
Transmit Data minus (TD-)
Receive Data minus (RD-)
3
Receive Data plus (RD+)
Transmit Data plus (TD+)
6
Receive Data minus (RD-)
Transmit Data minus (TD-)
4,5,7,8
Not used
Not used
Note:
The “+” and “-” signs represent the polarity of the wires that
make up each wire pair.
Summary of Contents for 7824M/FSW
Page 2: ......
Page 18: ...TABLE OF CONTENTS xviii E Ordering Information E 1 Glossary Index ...
Page 40: ...NETWORK PLANNING 2 8 ...
Page 58: ...INSTALLING THE SWITCH 3 18 ...
Page 68: ...MAKING NETWORK CONNECTIONS 4 10 ...
Page 72: ...TROUBLESHOOTING A 4 ...
Page 80: ...CABLES B 8 ...
Page 86: ...EXTENDER MODULES C 6 ...
Page 96: ...ORDERING INFORMATION E 2 ...
Page 102: ...GLOSSARY Glossary 6 ...
Page 106: ...INDEX Index 4 ...
Page 107: ......