On 1 Jun 2011, at 16:55, Otmar Lendl wrote:
Our experience in Austria has been that an ENUM service independent of the PSTN operator for the phone number has almost no market potential.
Indeed. Though this is not just an Austrian experience. It appears to be a universal one. I think it's very hard to find any success story for ENUM on the Internet. Public ENUM is essentially dead. Apart (maybe) for phone numbers in blocks associated with VoIP operators. But even there, some of those operators are relying on termination fees for incoming calls from the PSTN. So they'd prefer their customers to have tel: URLs instead of sip: URLs. Which kind of defeats the point. I think it's time this WG considered its future. The IETF WG has closed down. That should be a very clear hint.