Interesting stuff. James Seng has sniffed the Google Talk packet stream. It’s vanilla XMPP (the Jabber Protocol). One neat innovation is that each Google Talk client is a STUN server, thus replicating Skype’s ability to traverse firewalls, in a standard way. How long before we see this in SIP clients?
Alec Saunders is the Vice President of Developer Relations for BlackBerry make Research in Motion. This is his personal blog, with his personal viewpoints. Prior to this Alec was the CEO and co-founder of Calliflower — the easiest way to hold a meeting, online, on a conference call, or on the go. A double-decade veteran of product management and marketing, he spent nine years at Microsoft where he helped launch Windows 95, the first two versions of Internet Explorer, the Universal Plug and Play initiative, the push into home markets, opt-in email marketing and what might well go down in history as the very first direct email list ever.
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While this might seem smart, I'm not sure it works. In a typical situation where both GT clients are behind a firewall, they still would not be able to talk since the initial STUN binding requests would not make it through the firewalls.
More likely they are including a STUN server to be compliant with ICE, another standard (fortunately) used to do NAT traversal.