[SIPForum-discussion] When to bill a SIP Call ?

[Ahmed Faisal Hassan]

Hi,

Consider a very common scenario of a SIP call from A to B.


A                                        B 

01        INVITE 

     -----------------------------------> 

02       100 TRYING
    <------------------------------------03       180 Ringing 

    <------------------------------------ 04       200OK With SDP
   <---------------------------------------- 

05       ACK
 

 

   ------------------------------------------>06             BYE 

 

   <------------------------------------------07           ACK 

    -------------------------------------------> 


 

I need to know 
1. where exactly 'A' party will start billing.   After 04 or 05?  2. where exactly 'B party will start billing.   After 04 or 05?
Thanks






      
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