Sip Session Timer - Siemens A31003-D3000-M100-01-76A9 Administrator User Manual

Administration
System Settings

3.5.8 SIP Session Timer

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Media IP mode defines which IP version is to be used for voice transmission.
With "IPv4", only IPv4 is used; with "IPv6", only IPv6 is used; with "IPv4_IPv6",
both IPv4 and IPv6 can be used, but IPv4 is preferred; with "IPv6_IPv4", both IPv6
and IPv4 can be used, but IPv6 is preferred.
Administration via WBM
System > SIP interface
Administration via Local Phone
|
--- Admin
|--- System
|--- SIP Interface
|--- Media negotiation
|--- Media IP mode
Related Topics
Session timers provide a basic keep-alive mechanism between 2 user agents or
phones. This mechanism can be useful to the endpoints concerned or for stateful
proxies to determine that a session is still alive. This is achieved by the phone
sending periodic re-INVITEs to keep the session alive. If no re-INVITE is received
before the interval passes, the session is considered terminated. Both phones are
supposed to terminate the call, and stateful proxies can remove any state for the
call.
This feature is sufficiently backward compatible such that only one end of a call
needs to implement the SIP extension for it to work.
OpenScape Desk Phone IP, Phone Administration, Administrator Documentation
A31003-D3000-M100-01-76A9, 02-2013