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This article describes the steps necessary to configure a 

Spacevars
0 product

to employ the SIP Timer Functionality in the depicted topology:

Configuration

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1. In the WebUI, click the Settings tab.
2. In the left navigation pane, go to SIP > SIP Profiles
3. Select the relevant SIP Profile.

4. Configure the Session Timer as shown in the figure below.
   Important: The Offered Session Timer value must be equal to or greater than the Minimum Acceptable Value.

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   Caption 0 Figure 1 Configure Session Timer Image Modified

Signaling Group

1. In the WebUI, click the Settings tab.
2. In the left navigation pane, go to Signaling Groups > (relevant SIP Signaling Group).
3. Select the SIP Profile configured above from the SIP Profile selection list.

4. Click Apply

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   Caption 0 Figure 1 Apply Configured SIP Profile Image Modified

Call Flow

After having applied the configuration changes, in the call flow, the 

Spacevars
0 product

supports the UPDATE and INVITE  methods for changing the media capabilities. Session Timer (RFC 4028) uses the INVITE or UPDATE as a mechanism for a periodic refresh of SIP sessions.

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Caption 0 Figure 1 SBC 1000/2000 to Lync/SBA Call Image Modified

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