Abstract: In one embodiment, a method includes sending a call invite message to initiate a call with one or more callee devices. In one example, the call invite message may be a session initiation protocol (SIP) INVITE message. The invite message may be sent to a multi-line system that is shared between multiple callee devices (e.g., a key system). A calling identifier (ID) may then be received by a callee device after sending the call invite message. The calling ID is then sent in an update message to the one or more callee devices. For example, the update message may be a SIP UPDATE message. The callee devices can then use the calling identifier to perform an action, such as displaying the calling ID for a callee to view. Accordingly, a method for providing a calling ID to a callee device is provided when a call invite message has already been sent.

Abstract: In one embodiment, an apparatus is disclosed which comprises a status sensitive input related to a programmed telephone number for conveying a control signal to a controller of a telephone to initiate a function; a detector for determining a status of the telephone and conveying the status to the controller of the telephone; wherein the function initiated by the controller is chosen from two or more functions dependent upon the status of the telephone as determined by the detector.

Abstract: Idle DSP channels of an IP phone can be used to respond to a request to transcode a codec of an incoming call in a distributed IP phone system but only if sufficient idle channels remain available to the phone to handle basic call functions and a possible non-basic call feature (such as conferencing) of the phone.

Abstract: Idle DSP channels of an IP phone can be used to respond to a request to transcode a codec of an incoming call in a distributed IP phone system but only if sufficient idle channels remain available to the phone to handle basic call functions and a possible non-basic call feature (such as conferencing) of the phone.