FreeSWITCHers,

As some of you may have noticed I frequently comment on SIP-related
FreeSWITCH posts. Long story short I decided to finally put some of
these thoughts and experiences down in writing. What I ended up with
is a 21 page (and counting) document describing various SIP header
fields, SDP information, RTP issues, DTMF issues, NAT traversal
technologies, interop headaches, etc.

I wrote a little intro and linked to the document if any of you
would like to check it out (link at the end of post):

http://blog.krisk.org/2012/06/everything-you-wish-you-didnt-need-to.html

Of course I'd appreciate any feedback you may have. What do you
disagree with? Find a typo? Have burning SIP/RTP/SDP/T.38/codec
questions you'd like to see me address? Should I get into more
implementation (FreeSWITCH) specific issues? Let me know.

Thanks!

--
Kristian Kielhofner

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