Hardware Description
4
Manual Documentation Number EIRP305-T
– 0912m
www.bb-elec.com
www.bb-europe.com
All ports on the EIRP305-T support automatic MDI/MDI-X operation, you can use straight-
through cables (See Figure below) for all network connections to PCs or servers, or to other
switches or hubs. In straight-through cables, 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 and MDI-X port pin outs.
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-)
Straight Through Cable Schematic
Cross Over Cable Schematic
