IMG 1010 - SIP Options Keep Alive Overview - Busy Out
The IMG can monitor the status of 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.
...
RFC 3261 SIP: Session Initiation Protocol, Section 11.
Related Topics
IMG 1010 - SIP Profile - 10.5.3
IMG 1010 - SIP Options KeepAlive Configure (Busy Out)
Configuration
Enable the SIP Busy Out feature on a specific gateway by executing the following.
...
In the External Gateway Pane in Clientview select "enable" from the drop down menu in the "SIP Options Keep Alive" field. See below.
10.3.3
10.5.0
Once the Options Keep Alive is enabled then the Parameters can be configured. Right click on SIP SGP profiles object pane and select New Options Keep Alive and the SIP Options Keep Alive pane will appear.
Number of Responses
...