[Asterisk-Users] Dead FXO Interface?

[Blake OPS]

Every once in a while one of my FXO interfaces will not accept
incoming calls. The other interfaces on the same board will continue
to accept calls.

Here is what I see in the logs:
ERROR[4465]: fsk_serie made mylen < 0 (-22)
WARNING[4465]: CallerID feed failed: Success
WARNING[4465]: CallerID returned with error on channel 'Zap/3-1'

I also see this:
WARNING[811]: zt hook failed: Device or resource busy

Has anyone had a Digium FXO go bad after about a year? The problem is
intermittent. Is this how a bad FXO would behave, or is it likely a
wiring problem?

Thanks,
Blake