[Sipping] how to response the offer

[孙永光 <sammanengineer at gmail.com>]

Dear All

 

   I have a question about How to respond the offer , the scenario is as following

 

A call B , and the offer and answer is ok , after a while , A receives a B 's REINVITE which includes the same SDP as it just answered before

 

now, How does A respond it ? 

 

does A  must respond  the B's new offer  with   the same SDP as the offer it sent previously?

 

could you give some advice ?

 

Thanks

 

SunYongGuang

 

 

 

 

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msn:yongguangsun at hotmail.com