The present invention provides a service node capable of coordinating call processing for incoming calls intended for any one of multiple telephony devices of a given entity, such as a business or individual user. Switching devices, such as traditional telephony switches or internetworked gateways controlling call routing, are configured to interact with the service node to determine how to handle incoming calls to the telephony devices that they serve. Through a variety of techniques, the entity can dynamically instruct the service node how to route incoming calls, and preferably, upon putting those instructions into effect, the service node will send an alert to the entity. The instructions are used by the service node to create call processing rules for the switching devices to apply to an incoming call intended for any of the entity's telephony devices.