Hi All,
1.
Caller Callee
---------INVITE---------------->
supported: timer
Session-Expires: 200
<---------------200(INVITE)---
supported: timer
Session-Expires: 200;refresher=uac
-----------ACK---------------------->
---------INVITE----------------> // Here callee should assume that
peer supports session timer or not because supported: timer is not present
in request.
2.
Caller Callee
---------INVITE---------------->
supported: timer
Session-Expires: 200
<---------------200(INVITE)---
supported: timer
Session-Expires: 200;refresher=uac
-----------ACK---------------------->
---------INVITE----------------> // Here callee should assume that
peer does not support session timer
supported: 100rel
a. Please let me know what should be correct behavior for above
both cases. And other SIP stack has implemented this.
b. Application scenario where supported value is changed in
between the session.
Thanks & Regards,
Ravi Kumar
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