US Patent 7668157 Presence based telephony

A device is provided including a processor and a display configured to list more than one presence enabled contact. A user agent is configured to indicate an availability status of the device to a presence server. The user agent is at least partially executed by the processor. Moreover, at least one input is configured to enable a device user to request a communications session with at least one of the plurality of presence enabled contacts. The request is initiated by the user agent when the requested presence enabled contact is available.