In the Station form, the SIP Station type has the following fields; Primary Session Manager, Secondary Session Manager, Third Session Manager, and Fourth Session Manager. These fields are populated from System Manager and are read-only on the Communication Manager SAT interface. These fields cannot be modified on the Communication Manager SAT interface. If the call to this SIP station is routed to a SIP trunk (via AAR/ARS and then route pattern or trunk group) that has a clustered signaling group, then SIP Trunk Optimization feature sends the Invite for the station to SM-Primary. If SM-Primary is not reachable, then the Invite is sent to SM-Secondary. The Session Manager selection for routing to a SIP station does not apply to a call between two SIP stations. In this case, the Session Manager itself decides the destination Session Manager for the called SIP station.

IP addresses are allocated to these fields only when the policy-based assignment is enabled in System Manager.