[Freeswitch-users] ACK disappeared from SIP session, Help

["Гришин В.С."]

the scheme is PBX---E1--Cisco 2811-----VoIP SIP-----FreeSWITCH-----VoIP 
SIP---asterisk(1.8.20)---IP Phone

FreeSWITCH IP is 191.21.19.12
Asterisk IP is 162.48.13.26
Call comes to FreeSWITCH from a Cisco 2811.

SIP session between freeswitch and asterisk(1.8.20)


|Time     | 191.21.19.12                          |
|         |                   | 162.48.13.26 |
|21.048754|         INVITE SDP (g711A CN)         |SIP From: "91295" 
<sip:9195 at 191.21.19.12 To:<sip:9647 at 162.48.13.26
|         |(5065)   ------------------>  (5060)   |
|21.048758|         INVITE SDP (g711A CN)         |SIP From: "91295" 
<sip:9195 at 191.21.19.12 To:<sip:9647 at 162.48.13.26
|         |(5065)   ------------------>  (5060)   |
|21.065794|         100 Trying|                   |SIP Status
|         |(5065)   <------------------  (5060)   |
|21.122406|         180 Ringing                   |SIP Status
|         |(5065)   <------------------  (5060)   |
|21.143580|         RTP (g711A)                   |RTP Num packets:50  
Duration:0.922s SSRC:0xB5320A6
|         |(21866)  <------------------  (12772)  |
|22.282684|         180 Ringing                   |SIP Status
|         |(5065)   <------------------  (5060)   |
|22.296762|         181 Call is being forwarded   |SIP Status
|         |(5065)   <------------------  (5060)   |
|27.558268|         180 Ringing                   |SIP Status
|         |(5065)   <------------------  (5060)   |
|35.039883|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|35.307222|         RTP (g711A)                   |RTP Num packets:1490  
Duration:29.773s SSRC:0x530CAB37
|         |(21866)  <------------------  (12772)  |
|35.476614|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|35.532995|         RTP (g711A)                   |RTP Num packets:2966  
Duration:29.680s SSRC:0x308FC816
|         |(21866)  ------------------>  (12772)  |
|36.436846|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|38.282686|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|42.025399|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|45.637280|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|49.343115|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|53.119940|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|56.907800|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|60.791453|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|64.606730|         200 OK SDP (g711A)            |SIP Status
|         |(5065)   <------------------  (5060)   |
|65.219392|         BYE       |                   |SIP Request
|         |(5065)   <------------------  (5060)   |
|65.234354|         200 OK    |                   |SIP Status
|         |(5065)   ------------------>  (5060)   |
|65.234359|         200 OK    |                   |SIP Status
|         |(5065)   ------------------>  (5060)   |

It is visible that there is no package with ACK confirmation from a 
FreeSWITCH to Asterisk. Asterisk sends several times SIP OK on a 
freeswitch, and without having waited confirmations (ACK) after 23 
seconds sends SIP BY on a freeswitch and on IP Phone. After that call 
stops. Before disconnection subscribers hear each other of 29 (+-) seconds

In tcpdump between Cisco and FreeSWITCH it is visible that the SIP ACK 
packet from Cisco arrives on a freeswitch.

In what place the SIP ACK in a FreeSWITCH disappeared?
What to me to analyse in SIP session?
Maybe someone solved a similar problem?
please, Help!

Vladislav Grishin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20131030/00d65a38/attachment-0001.html