Acme Packet (MOSC)

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Change of RTP source while early media causes blocking of stream

edited Aug 30, 2013 2:55PM in Acme Packet (MOSC) 4 commentsAnswered ✓

Hi Folks,

 

I have two problems probably belonging together. For a better understanding i drew two small sketches.

 

Problem One

So, the following happens:

  1. Invite from Softswitch via SBC to Proxy.
  2. The Proxy does searial Forking and first delivers the call to a Softphone.
  3. The Softphone starts ringing.
  4. After a timeout the proxy cancels this leg (I discarded the OK and ACK in the sketch) and sends an Invite to a mobile phone.
  5. This mobile phone is currently not reachable, so a "183 - Early Media / Session Progress" is sent. This contains a valid sdp.
  6. BUT the ACME blocks this RTP and does not deliver it to the Softswitch.
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