Edimax Technology EW-7303 APn V2 - Manual (Page 8)

2.4 rear panel description
Interfaces Description
SMA connector
For external antenna. You can use the SMA connector to connect with
2.4GHz external antenna.
Secondary(Middle)
The RJ-45 sockets allow LAN connection through Category 5 cables.
Support auto-sensing on 10/100M speed and half/ full duplex; comply
with IEEE 802.3/ 802.3u respectively.
Main(Right)
The RJ-45 socket allows WAN connection through a Category 5 cable.
Support auto-sensing on 10/100M speed and half/ full duplex; comply
with IEEE 802.3/ 802.3u respectively.