Blazej used his keyboard to write :
> When I foward the port number 5060, which is my SIP port, everything works
> fine until WAN IP address is changed (usually every once a day), then my VOIP
> adapter dosen't catch the IP change and no further calls are possible unless
> I reset router or VOIP adapter.

Your PAP2 is set to register with your Internet Telephone Provider once
an hour.

Try shortening the registration period - "Register Expires: 3600"