10/100Base-Tx Pin Assignments - Nortel BES50GE-12T PWR User Manual

158 BES50 reference information
"RJ-45 connector pin numbers" (page 158)
RJ-45 connector are numbered. Be sure to hold the connectors in the same
orientation when you attach the wires to the pins.
RJ-45 connector pin numbers

10/100BASE-TX pin assignments

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).
Data is delivered on the standard two wire pairs (1+2, 3+6), and power is
supplied by using the two previously spare pairs (4+5, 7+8). The RJ-45
ports on the switch base unit 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. When using any RJ-45 port on this
switch, you can use either straight-through or crossover cable.
10/100BASE-TX pin assignments table
Pin
1
2
3
4
5
6
7
Copyright © 2006, Nortel Networks
.
MDI-X signal name
Receive Data plus (RD+)
Receive Data minus (RD-)
Transmit Data plus (TD+)
GND
GND
Transmit Data minus (TD-)
-48V
SMB
Using the Nortel Business Ethernet Switch 50 Series
NN47924-301 01.01 Standard
1.00 October 2006
illustrates how the pins on the
MDI signal name
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Receive Data plus (RD+)
GND (Positive Vport)
GND (Positive Vport)
Receive Data minus (RD-)
-48V feeding power (Negative
Vport)
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