SIP frame

Can you give me a URL where I can find a SIP frame?

What do you mean by a ‘SIP frame’?

I use a PCBX Asterisik and I use the SIP protocol.
So, I want a synoptic of a standard SIP frame (if it exist) like a TCP frame (@source, @destination, Mac address…).
Thanks. … n_Protocol

OK, thanks…