2011/3/28 Juha Heinanen jh@tutpro.com:
i read somewhere that googletalk now supports sip
I don't think so. GoogleTalk is XMPP and uses Jingle for voice. Maybe you meant GoogleVoice (https://www.google.com/voice/) which is a PSTN service in which Google uses SIP internally.
how is jingle related to googletalk?
Jingle is a extension for adding voice/video support into XMPP.