|Time     | 10.20.142.140     | 192.168.0.251     | 10.20.142.151     |
|273,187  |         INVITE SDP ( g711A g711U telephone-event)          |                   |SIP From: sip:44526098300@10.20.138.101:5100 To:sip:44553022915@asn.domain.de:5100
|         |(5060)   ------------------>  (5060)   |                   |
|273,188  |         100 Trying|                   |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|275,309  |         183 Session Progress SDP ( g711A telephone-eve...          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|275,315  |                   |         RTP (g711A)                   |RTP Num packets:687  Duration:13.743s SSRC:0x7B79B77F
|         |                   |(12346)  ------------------>  (5486)   |
|283,320  |         200 OK SDP ( g711A telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|283,344  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|289,067  |         BYE       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|289,067  |         200 OK    |                   |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |