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Session Timer
The time interval in which the phone periodically refresh SIP
sessions by sending repeated INVITE requests. These INVITE
requests allow the user agent or proxies to determine the status
of the SIP session.
Media Port
Real-time Transport Protocol port number. Provides end-to-end
transfer of data with real-time characteristics, such as streaming
audio and video.
Prack
Prack ensures that media information is exchanged and that
network checks before connecting the call. Select Enable for a
more reliable connection.
Session Refresher
Select None to disable SIP session timer support.
Select UAC to initiate SIP request.
Select UAS to receive SIP request and then return a response.
Session Timer Method
Select SIP request method. Default method is Invite.