Direct SIP Explained
This guide is outdated. How does direct SIP work? The way direct SIP calls are initiated is very similar to the way sending an email works. A caller can call a callee from either a stand alone SIP phone which is not registered to any SIP server, to a VoIP provider, or from a SIP phone registered to an IP PBX, which supports direct SIP. If a user calls "[email protected]" [...]


