[SIPForum-discussion] Finall what codec they are using..

[Saurabh Shah]

sdp1 & sdp2 should have atleast one common codec. Otherwise call must be
ended with 488 not acceptable.
Same thing is apply to sdp2 & sdp 3.
If your controller is having transcoding facility, codec between
A-controller and controller-B can be different.
But it do not have such facility, both A & B must have atleast one common
codec to establish a call.
 
Regards,
Saurabh Shah

  _____  

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Raees Shaikh
Sent: Tuesday, December 11, 2012 7:46 AM
To: vijay kant gupta
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Finall what codec they are using..



I would think it should either allocate a transcoder or the call should fail

Regards 
Raees

On Dec 10, 2012 3:51 AM, "vijay kant gupta" <vijaykant.it2002 at gmail.com>
wrote:


       
Hi Can any body suggest Finally Call setp with which Common SDP. .
Or it need correction.. last 200 Ok should contain Sdp3.


             A              Controller               B

             |(1) INVITE bh sdp1 |                   |

             |<------------------|                   |

             |(2) 200 sdp2       |                   |

             |------------------>|                   |

             |                   |(3) INVITE sdp2    |

             |                   |------------------>|

             |(4) ACK            |                   |

             |<------------------|                   |

             |                   |(5) 200 OK sdp3    |

             |                   |<------------------|

             |                   |(6) ACK            |

             |                   |------------------>|

             |(7) INVITE sdp3    |                   |

             |<------------------|                   |

             |(8) 200 OK sdp2    |                   |

             |------------------>|                   |

             |(9) ACK            |                   |

             |<------------------|                   |

             |(10) RTP           |                   |

             |.......................................|

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