test6.txt

this is simple sip stack.

INVITE sip:[e-mail] SIP/2.0
To: sip:[e-mail]
From: sip:[e-mail]
Call-ID: 0ha0isndaksdj@10.0.0.1
CSeq: 8 INVITE
Via: SIP/2.0/UDP 135.180.130.133
Content-Type: application/newformat
Content-Length: 37

<audio>
 <pcmu port="443"/>
</audio>