I have a naked dsl connection from Orcon with the sx763 rented modem.
I had a big dissapointment when I got this message while trying to configure the SIP client:
End users are not authorized to create or modify VOIP accounts.
Please contact your operator if you want to subscribe to this service.
Do I need an external ATA to use a SIP provider or is there a workaround to activate the built in SIP client?