[sipxtapi-dev] One way audio after 200 SDP

[Serkan Demirel <serkan@xxxxxxxxxxxx>]

Hi,

I experience the following problem using the latest sipXtapi when i call 
to a PSTN gateway. However, the
same situation works fine when i use sipXtapi-media-update.

The audio is full-duplex until i receive a 200 SDP message from the PSTN 
gateway. After this
there is no audio being sent at all towards the PSTN gateway, only 
received.


This is the overview of the SIP messaging between sipXtapi(A) and our 
PSTN gateway(B):

   A            B
       INVITE
0.0s ------------->
       TRYING
0.1s <-------------
     183 + SDP
0.1s <-------------

       MEDIA
   <------------> //notice: both ways
   <------------>
   <------------>

     200 + SDP
5.0s <-------------
       ACK
5.1s ------------->

       MEDIA
   <------------- // notice: one way
   <-------------
   <-------------


It seems like sipXtapi and sipXtapi-media-update are reacting 
differently to the 200 SDP message.

Thanks,

Serkan