Hello, I didn't find any hardware implementation of jabber voice. So, I think it is possible to implement sip2xmpp gateway in jabber client side.
For example, I want to make voice chat with GoogleTalk contact in my roster and I have VoIP phone adapter (like Addpac). I'm starting voice chat with him and my client program and it is ringing to my phone by sip and to jabber contact by jingle, then connecting rtp streams. Is there any implementation of this? -- Regards, Oleg