Reconfiguring a NEC phone system by swapping round phone entensions brought up the follow error in IPFX when trying to register the device to update the name

: Registration Failed 28672. This is a timeout message.

To unregister phone extension in IPFX click on Register button in properties which holding shift key

Best way is to manually shutdown services then start. This will stop any qeues working that are not hard configured on the telephone system as well to fall back on. In Order shutdown service starting with IPFX and VM. When done stop the rest.

If having issues starting IPFX VMports , if you check the logs it could be becuase windows has locked one of the UDP ports. You will need to restart the whole server