From the CLI, try the following :
int [the specific int]
That'll reset the port, but I'm really not sure if there's a GUI equivalent in ADSM. You might also want to
try a "show int [the specific int]" from the CLI. If both the int and line protocol are in DOWN state, likely
nothing connected, or someone was waltzing in the datacenter again and tripped over a cable.
3750G#sh int gi 1/0/2
GigabitEthernet1/0/2 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is ...
BTW, weren't you making noises about kicking this ASA to the curb for a Zyxel, or am I remembering incorrectly Anav?