i am assuming that its a ZF7731 P2P radio. It comes with Gigabit ethernet port however you can check at which ethernet speed/rate device is negotiating with switch by looking into AP support file.
Pull AP support file fromthe device and open in a notepad. Look for keyword interface and see example below:
Port Interface 802.1X Logical Link Physical Link Label
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0 eth0 None Up Up 100Mbps full 10/100/1000 PoE
1 eth1 None Down Down 10/100/1000
