Abstract: The methods for handling a communication request received for a former user of a communication system include sending updated address book information for the former user to an initiator's address book, redirecting the communication request to the forwarding address for the former user, redirecting the communication request to an assigned replacement of the former user, or any combination of the above. Additionally, the replacement's address book information may be sent to the initiator's address book for updating. In one embodiment, a replication of the former user's address book is retained to assist in determining how to handle the received communication request.

Abstract: A system and method for real-time call log status includes a call log database of call records representing transpired communication events. The call log is displayed for the user and includes a status indicator for each of the events. The status indicator may be an icon, a description, a pop-up window, a pop-up menu or any other indication that informs the user of the real-time status of the name/number associated with the displayed event. In this manner, the user is able to determine, at a glance, whether the name/number is available to participate in an impending communication event.

Abstract: An improved system and method for remote access from a variety of remote clients to an office telephone is provided. In the preferred embodiment, access to an office information center is through the Internet using a web-compliant remote client. The office information center includes a web server having a web page stored thereon and a PBX system. During a remote session, incoming calls to the PBX are routed to the remote client in real time. In addition, the remote client is able to view, manage and control voice mail messages using all the functions programmed to the office telephone from the remote client. Upon termination of the remote session, PBX ports are re-established to the office telephone and any alternations made by the remote client are updated.

Abstract: A voice over Internet protocol (VOIP) directory service for communications users of an enterprise locates a telephone or work station of a called party for the purpose of setting up real-time communication, either from a pulse code modulation (PCM) telephone or from an Internet protocol (IP) telephone, or a computer by way of the world wide web, using a common directory database. Once the directory entry has been found, it may be immediately called through use of translated addresses assigned to the selected called party device.

Abstract: A system and method is designed for upgrading a digital PBX used with a pulse code modulation (PCM) telephone system by providing an interface card connected to the back plane of the PBX. The interface card acts as a replacement for the digital key set cards normally used with the back plane of such a PBX. The interface card is designed with circuitry to process voice-encoded packet data directly from a LAN to the PCM data used within the PBX network, and to process PCM data from the telephone network to voice coded packet data on the LAN to provide a voice-over Internet protocol and interface with the telephone system connected with and controlled by the PBX.

Abstract: A telephone system and method is provided including a processing system, such as a CTI system, in communication with a PBX and one or more telephone sets. The user selects a pre-programmed canned message, such as a DND message or status-state, from a list of messages and may further define the message with a user-defined message. The PBX recognizes the canned message and funnels the message to the processing system. The processing system matches the canned message and possibly the user-defined message to a software application stored in the processing system and corresponding to the messages. The user may program the software application to perform a specific function which may be stored in the processing system. The software application is launched and the telephone can be returned to a normal operating state regardless of whether the launched application has completed the intended task.

Abstract: An enhanced computer telephony (CT) network design for a private branch exchange (PBX) telephone system network improves the computer telephony interface (CTI) capabilities of the network. Bi-directional data from remote telephone switching nodes of different PBX systems, each using a common software application, is combined into a single data stream by the network to simplify control of the remote PBX systems. Commands to, and events received from, the different PBX switching nodes are combined by use of a gateway to automatically and transparently route digital information for control of the correct remote system node.

Abstract: A system for ensuring optimum performance of a modem used in conjunction with a telephone system employing a digital PBX coupled with a two-wire analog trunk includes an echo cancellation circuit having an adaptive filter connected in series circuit with a linear codec between the digital PBX and a two-to-four wire hybrid converter coupled with the two-wire analog telephone trunk. The combination of the echo canceller and the linear codec allows accurate decoding of weak far end modem signals when such signals are summed with a strong near end modem signal echo. The DSP echo canceller removes the very strong near end modem echo and passes the far end modem signal with little distortion, while the linear codec permits accurate recovery of the weak far end signal in the presence of high noise levels.