When you set Enable SIP Agent Reachability to y on the System-Parameter Features screen, Communication Manager polls SIP endpoints for monitoring the reachability of logged in Call Center Elite SIP agents. Communication Manager polls SIP endpoints in either a default 5 minute window or a window based on a user-defined interval. If Communication Manager does not receive a response from the SIP endpoint, the state of the Call Center Elite agent is changed to the AUX work mode with an optional reason code. To determine that the problem is not a short term one, Communication Manager continues to poll the SIP endpoint at a faster interval. If the SIP endpoint fails to respond based on the administered parameters, Communication Manager logs out this agent.

Similarly, the reachability function can also be extended to domain-controlled SIP stations. The domain-controlled reachability monitoring is independent of the agent reachability monitoring and does not require an agent to be staffed. Communication Manager uses domain-controlled reachability to send the station reachability information to CTI applications that need to track the status of this station. You can enable or disable the domain-controlled reachability at the system level on the System-Parameter Features screen using the Enable Reachability for Station Domain Control setting. You can also administer domain-controlled reachability on a station-by-station basis on the Station screen using the Enable Reachability for Domain Control SIP Stations setting.