|Time     | 10.10.10.128                       | 10.20.20.153                         |
|         |                   | 10.15.15.122     |                   
|168,408  |         INVITE SDP ( telephone-event)          |                   |SIP From: sip:33344408@10.10.10.128:5060 To:sip:123456@10.15.15.122
|         |(5060)   ------------------>  (5060)   |                   |
|168,411  |         100 trying -- your call is important to us          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|168,411  |                   |         INVITE SDP ( telephone-event)          |SIP Request
|         |                   |(5060)   ------------------>  (5060)   |
|168,417  |                   |         100 Trying|                   |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|172,129  |                   |         183 Session Progress SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|172,130  |         183 Session Progress SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|180,203  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|180,204  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|180,229  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|180,706  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|180,708  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|180,718  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|181,716  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|181,717  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|181,733  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|183,726  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|183,727  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|183,738  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|187,736  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|187,737  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|187,747  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|191,745  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|191,746  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|191,756  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|195,754  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|195,755  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|195,766  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|199,762  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|199,764  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|199,774  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|203,772  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|203,773  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|203,784  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|207,781  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|207,782  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|207,793  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|211,790  |                   |         200 OK SDP ( telephone-event)          |SIP Status
|         |                   |(5060)   <------------------  (5060)   |
|211,791  |         200 OK SDP ( telephone-event)          |                   |SIP Status
|         |(5060)   <------------------  (5060)   |                   |
|211,802  |         ACK       |                   |                   |SIP Request
|         |(5060)   ------------------>  (5060)   |                   |
|212,235  |                   |         BYE       |                   |SIP Request
|         |                   |(5060)   <------------------  (5060)   |
|212,237  |         BYE       |                   |                   |SIP Request
|         |(5060)   <------------------  (5060)   |                   |
|212,253  |         200 OK    |                   |                   |SIP Status
|         |(5060)   ------------------>  (5060)   |                   |
|212,254  |                   |         200 OK    |                   |SIP Status
|         |                   |(5060)   ------------------>  (5060)   |