> Voice calling between domains without prior contractual relationship, as is the case for email, is nowhere in sight. This is exactly one of the things that

> Voice calling between domains without prior contractual relationship, as is the case for email, is nowhere in sight. This is exactly one of the things that I tried to build first with Communick after my time working at Deutsche Telekom. They spent so much time and money building products around the idea of letting people buy DIDs, or to let people continue pretending that they care about their phone number, and I was there asking "why don't we just provide voice call by SIP and let people create their own addresses? Then you could get customers even from competing phone companies."