SIP Settings
Use the SIP Settings page to configure settings related to SIP sessions, as shown in the illustration below. After changing any of these settings, the phone must be restarted for the changes to take effect.
SIP Settings
Use SIP session | Specify the preference for using SIP session |
timers | During a SIP session, if SIP session timers are active, the SIP User |
| Agent (UA) periodically sends INVITE or UPDATE requests (also |
| called refresh requests) to keep the SIP session alive. The interval |
| and use of the |
| the UAs in a call does not receive the refresh request within the |
| expiration timeout period, it will terminate the session. |
| The available options in FLX are: |
| Inactive – Session Timers will not be used in any session, except if |
| explicitly required in the remote request. |
| Optional – Session Timers will be used in all sessions whenever the |
| remote supports and uses it. |
| Required – Session Timers support will be a requirement for the |
| remote to be able to establish a session. |
| Always – Session Timers will always be used in all sessions, |
| regardless of whether or not the remote supports or uses them. This |
| option is the FLX default. |
Session timers | The expiration period is the interval at which the phone will consider |
expiration period | the SIP session timed out if it does not receive a refresh message |
| from the remote phone. It is measured in seconds; the default is |
| 1800. At call negotiation, the nodes will negotiate the expiration |
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