Simply do the following to resolve this error message in Camelot 3.x:
1. go to Misc/Setup > Company/Misc Info pull-down menu option
2. go to the Caller ID integration tab
3. set the Whozz Port there to be NONE instead of 3520, and click OK
That will resolve the error. If you are using the Whozz Calling caller id device, then you will need to establish different port numbers for each computer to use to interface with that device, and setup the device itself to use communicate to all those ports.
