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Table of Contents
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The IMG 2020 can monitor the status of multiple external SIP gateways by sending periodic SIP OPTIONS messages. If the gateway does not respond to one OPTIONS message the gateway will be considered down or unreachable and attempt to re-route the call to a different gateway. Once the gateway is down or considered unreachable it will take the configured amount of responses to show the gateway as UP or Reachable. SIP Options Keep Alive - Gateway Busy Out follows RFC 3261 SIP: Session Initiation Protocol, Section 11.

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  • Right click on the Profiles object and select New SIP Profiles. The SIP Profiles object is a parent or container object. No configuration is needed here. Refer to the SIP Profiles topic for more information on this object.

  • Right click on the SIP Profiles object and select New SIP Profile. The first profile that gets created is a Default SIP Profile and cannot be modified. Disregard this profile.

  • Right click on the SIP Profiles object and select New SIP Profile again. In the SIP Profile object that appears, either enter a name that identifies this SIP Profile or accept the default name already entered. In this example the SIP Profile was labeled SIP_Options_KeepAlive_Profile.

  • Right click on the SIP Profile object just created and select New Options KeepAlive. Modify the fields as required.

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Down Timer (s) - Timer to define the interval the IMG 2020 will send the OPTIONS message to the gateway when the gateway is down or non responsive. Timer is in seconds (Default=30 seconds)

Refer to SIP Profile - Options Method - Busy Out-Keep Alive for more information.

Create Remote Gateway

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  • Right click on the Dialogic object and select New External Network Elements. The External Network Elements object is a parent or container object and no configuration is needed here. Refer to External Network Elements topic for more information.

  • Right click on External Network Elements and select New External Gateways. The External Gateways object is a parent or container object also and no configuration is needed here. Refer to External Gateways for more information.

  • Right click on External Gateways and select New External Gateway. Enter a name that identifies the gateway being configured. In this example the gateway was labeled SIP_Options_GW.

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  • Enter in the Gateway IP Address field an IP address of the gateway that the IMG 2020 will be communicating with.

  • Select the SIP Profile created above from the drop down menu in the SIP Profile field.

  • Enter the IP address of the remote SIP gateway.

  • Select the SIP Profile created earlier from the drop down menu of the SIP Profile field.

  • Select Enable from the OPTIONS Keep Alive field.

Refer to External Gateway topic for more information.

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The configuration above displays how to configure the SIP Profile and External SIP Gateway so that the SIP Options-Busy Out/Keep Alive functionality is configured. The next step is to configure the SIP signaling stack and SIP Channel Groups. Refer to the Configure SIP (Single SIP IP) topic for a procedure on how to configure the SIP functionality.

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