8
C
ABLES
Cable Specifications
Cable Types and Specifications
Cable
Type
Max. Length
Connector
10BASE-T
2-pair Cat. 3 or better
100-ohm UTP
100 m (328 ft)
RJ-45
100BASE-TX 2-pair Cat. 5 or better
100-ohm UTP
100 m (328 ft)
RJ-45
10BASE-T/100BASE-TX Pin Assignments
Caution: DO NOT
plug a phone jack
connector into any RJ-45 port. Use only
twisted-pair cables with RJ-45
connectors that conform with FCC
standards.
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP)
cable for RJ-45 connections: 100-ohm Category 3 or better cable for
10 Mbps connections or 100-ohm Category 5 or better cable for 100
Mbps connections. Also be sure that the length of any twisted-pair
connection does not exceed 100 meters (328 feet).
Because all ports on this switch support automatic MDI/MDI-X
operation, 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.
The table below shows the 10BASE-T/100BASE-TX MDI-X and MDI
port pinouts.
Pin
MDI-X Signal Name
MDI Signal Name
1
Receive Data plus (RD+)
Transmit Data plus (TD+)
2
Receive Data minus (RD-)
Transmit Data minus (TD-)
3
Transmit Data plus (TD+)
Receive Data plus (RD+)
6
Transmit Data minus (TD-)
Receive Data minus (RD-)
4,5,7,8 Not used at 10/100 Mbps
Not used at 10/100 Mbps
