1，在freeswitch的控制台里添加
sofia global siptrace on
然后就可以看到更多的sip通信的细节
send 347 bytes to udp/[211.157.136.98]:8830 at 15:50:03.710191:
ACK sip:[email protected]:8830 SIP/2.0
Via: SIP/2.0/UDP 116.62.159.xx:6060;rport;branch=z9hG4bKH16r2Bye4DSeN
Max-Forwards: 70
From: “95554” sip:[email protected]:6060;tag=7F27a1XmpvDNF
To: “1003” sip:[email protected]:6060;tag=2d62ef51
Call-ID: MGU5OTdhM2Q3NWU4ZDVhYWQyNDNmNmIxNDc2NjYwZjg.
CSeq: 125959465 ACK
Content-Length: 0