[nsp] VoIP Router beeping?

[Burton Windle]

One of our remote sites has a 2650 router and two 3524-XL-PWR switches. We
have Cisco VoIP at this site.

At least twice a day, they swear that they hear beeping from the Cisco
equipment, for about a minute or two. The only other thing in the wiring
closet is a patch panel.

The 2650 has two FXO and two FXS ports, for outgoing 911 calls and
incoming fax calls.  Could they be making beeps for some reason?

Any ideas??

--
Burton Windle                           burton at fint.org
Linux: the "grim reaper of innocent orphaned children."
          from /usr/src/linux-2.4.18/init/main.c:461