Abstract: A system for unified communication, according to one embodiment of the present invention, comprises a CAS communicatively coupled to a client. The CAS comprises a server communicatively coupled to a CAS application and a number of service providers. The server receives from the client a CAS message encoded in a CAS format and including a request for a unified communication service. The server communicates with the CAS application to determine a service type for the request. The server sends the request to one of the number of service providers. The server sends a reply message to the client.

Abstract: A unified communication server or Client Application Server (CAS) comprises a client communication module, a status determination module, an operation determination module, an object manager, and a permissions module. The CAS enables communication between a client device and a plurality of communication services. The CAS receives requests for services from the client devices. The CAS interacts with a plurality of service providers offering different functionality and responds to requests or provides listings of available services in a unified manner despite the service offerings and service providers being disparate. The present invention also includes a number of methods including a method for operating a unified communication server, a method for generating a list of possible operations, a method for determining the status of a user and a method for determining permissions of a user.

Abstract: A system for unified communication, according to one embodiment of the present invention, comprises a CAS communicatively coupled to a client. The CAS comprises a server communicatively coupled to a CAS application and a number of service providers. The server receives from the client a CAS message encoded in a CAS format and including a request for a unified communication service. The server communicates with the CAS application to determine a service type for the request. The server sends the request to one of the number of service providers. The server sends a reply message to the client.

Abstract: Systems and methods for monitoring, making, managing and controlling telephone communications with a computer call assistant with an integrated voice/data communications system are disclosed. A call assistant computer application preferably runs on a personal computer (“PC”) coupled to the integrated system over a packet bus. The call assistant exchanges control and/or status packets with the integrated system preferably over a packet bus. The call assistant enables the user to make, receive and control telephone calls, monitor the status of the user's extension, voice mail, etc., and preferably operates with integrated systems capable of transmitting and receiving voice and data in multiple modes.