Abstract: A voice processing system 10 is connected to the telephone network 110, and runs one or more applications 220 for controlling interaction with calls to or from the telephone network. The system records audio segments by first and second speakers, and extracts the vocal characteristics of each speaker. Then, when an audio segment recorded by the first speaker is played back, the system can apply to it the vocal characteristics of the second speaker, thereby making it sound as if the second speaker had recorded the segment.

Abstract: A voice processing system is connected to a switch via multiple telephone lines, and provides a set of line objects, each line object being associated with one of the physical telephone lines. The line object allows a demarcation to be made between the underlying voice processing system software, and external business applications. Thus a line object supports a set of methods such as Get DTMF Tone, Play Audio, Answer Call, and End Call, to allow the external business applications to perform desired operations on a telephone line. These methods are invoked via a set of corresponding IVR action objects, which in turn are integrated into the business application. The business application itself, and its IVR actions, regard the line objects effectively as servers to provide IVR functionality. The business application may therefore run partially or completely on a separate physical machine from the IVR system itself.

Abstract: A communications system may be used for transmitting and/or receiving data over a network. The system needs to exchange capability information with other systems in the network, in order to determine which forms of communication can be mutually supported. The exchange of information includes logical expressions involving two or more parameters. This allows, for example, a system to indicate that a higher error rate will occur if the throughput is increased. In the preferred embodiment, each capability parameter is specified in terms of a range between a minimum and a maximum acceptable value.