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

["Гришин В.С."]

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

Asterisk IP is 162.48.13.26 (External IP NAT )


30.10.2013 22:36, "Гришин В.С." пишет:
>
> 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
>
>
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>
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Vladislav Grishin
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