A "ngrep -W byline port 5060" dump would help more ...

regards
klaus


Ion Minzu wrote:
Hello,
 I have a problem: When someone begins a call from PSTN to my voip
 network, the session interrupts after 30 secconds. The UA don't receive
 the ACK message(6)[the ACK doesn't arrive].The scheme below indicate this
 situation.
 P.S. This situation happens just with one type of equipment: atcom
 AG468; with other equipment (atcom AT320ED, audiocodes, atcom AG168)
 all works fine.

 Very strange.
 Thunks.

|cisco-gateway|                 | openser |                      |UA's|
 X.X.X.X - public ip adress    eth0-X.X.X.Y - public IP       172.17.6.0/24
    |                          eth1-172.17.6.2                      |
    |           Invite               |           Invite             |
 1  |------------------------------->|----------------------------->|
    |           Trying               |           Trying             |
 2  |<-------------------------------|<-----------------------------|
    |           Ringing              |           Ringing            |
 3  |<-------------------------------|<-----------------------------|
    |           PRACK                |                              |
 4  |------------------------------->|                              |
    |           200 ok               |          200 ok              |
 5  |<-------------------------------|<-----------------------------|
    |           ACK                  |                              |
 6  |------------------------------->|                              |
    |................................|..............................|30 s
    |           Bye                  |            Bye               |
 7  |<-------------------------------|<-----------------------------|
    |           200 OK               |                              |
    |------------------------------->|                              |
    |                                |                              |


--
Klaus Darilion
nic.at


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