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This article describes the steps necessary to configure a 

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to employ the SIP Timer Functionality in the depicted topology:

Topology

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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.
    (info) Important: The Offered Session Timer value must be equal to or greater than the Minimum Acceptable Value.

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    1Configure Session Timer

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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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    1Apply Configured SIP Profile

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Call Flow

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

Spacevars
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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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1SBC 1000/2000 to Lync/SBA Call

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