Base-Tx Pin Assignments - Nortel 120 Using Manual

The following figure illustrates how the pins on the RJ-45 connector are
numbered. Be sure to hold the connectors in the same orientation when
attaching the wires to the pins.
RJ-45 connector pin numbering

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
Mb/s connections, or 100-ohm Category 5 or better cable for 100 Mb/s
connections. Also be sure that the length of any twisted-pair connection
does not exceed 100 meters (328 feet).
The RJ-45 port on the access point is wired with MDI pinouts. This means
that you must use crossover cables for connections to PCs or servers,
and straight-through cable for connections to switches or hubs. However,
when connecting to devices that support automatic MDI/MDI-X pinout
configuration, you can use either straight-through or crossover cable.
10/100BASE-TX MDI port pinouts
10/100BASE-TX MDI port pinouts
Pin
1
2
3
4
5
6
7
Copyright © 2006, Nortel Networks
.
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)
BAP120
Using the Nortel Business Access Point 120
NN47921-301 01.01 Standard
1.0 August 2006
Twisted-pair cable assignments 121
Nortel Networks Confidential