asterisk users - Jan 2005 - incoming calls produce multiple quarter rings and asterisk never answers.

I have an adit 600 connected to a normal analog line.  When I try 
to call that line, the phone rings a quarter ring(almost a beep) instead
of a complete ring and keeps ringing and ringing with asterisk never 
picking up the call.  Outgoing calls on those same lines aren't working
either.


Any suggestions on what might be wrong?


Thanks,



Jon.