1. Can UAS responds with multiple 18x for the INVITE request received?
YES.
2. What should be the behavior of UA1 if it receives multiple 18x?
Create dialog if the response contains tag. Update your state machine.
3. What should be the behavior of UA1 while receiving the second 18x with
SDP?
When the second 18x is rcvd with SDP, you should save the 18x as you need it
to send it back with your ACK. The UAS cannot send diff SDP in the 2xx now.

Also is there any particular reason that you are sending Invite WO offer?

On Sat, Oct 9, 2010 at 8:52 PM, Vijay S Nair
<[email protected]>wrote:

> Hi All,
>
> Here is the scenario,
>
> UA1                                                                     UA2
>
>  ----------------------------------INVITE w/o offer----------------->
>  <----------------------------------100 Try------------------------------
>                                                                 Connection
> / Port Not allocated
>  <----------------------------------18x w/o offer ----------------------
>                                                                 Connection
> / Port
> allocated
>  <----------------------------------18x OFFER -----------------------
>
> Here are my queries,
>
> 1. Can UAS responds with multiple 18x for the INVITE request received?
> 2. What should be the behavior of UA1 if it receives multiple 18x?
> 3. What should be the behavior of UA1 while receiving the second 18x with
> SDP?
>
> Please comment ...
>
> --
> Thanks & Regards
> Vijay Sukumaran Nair.
> _______________________________________________
> Sip-implementors mailing list
> [email protected]
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>



-- 
cheers!!!!
sarvpriya
http://sarvpriyak.blogspot.com/
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