Abstract: In Voice-over-IP or like systems, audio mixers are used for implanting conferencing applications for IP networks. In such systems, a problem exists as how to pass through user signal events, such a DTMF digits, in-band as well as out-of-band telephony events (RFC 2833/4733) because they are not handled well in such systems. In accordance with certain embodiments, a signalling event in incoming audio packets or user signalling event received out-of-band is detected at one of the inputs. A meta-data representation of the signal event is attached to the audio and passed through the mixer for regeneration, as in-band or out-of-band telephony events, on the other side of the mixer.

Abstract: Systems and methods are provided for a distributed conferencing service through an internet protocol (IP) network. A plurality of tributary mixers are configured communicate with a master mixer or a plurality of master mixers, at least one of which communicates through the IP network. Each tributary mixer is configured to join one or more respective participants to the distributed conference, generate a first mixed media stream by mixing a plurality of ingress media streams from the respective participants, and receive a second mixed media stream from the master mixer. The second mixed media stream includes media from at least one other participant joined to the distributed conference through another of the tributary mixers. Each tributary mixer also provides egress media streams to its respective participants based on a control signal from the master mixer.

Abstract: In Voice-over-IP or like systems, audio mixers are used for implanting conferencing applications for IP networks. In such systems, a problem exists as how to pass through user signal events, such a DTMF digits, in-band as well as out-of-band telephony events (RFC 2833/4733) because they are not handled well in such systems. In accordance with the invention, a signalling event in incoming audio packets or user signalling event received out-of-band is detected at one of the inputs. A meta-data representation of the signal event is attached to the audio and passed through the mixer for regeneration, as in-band or out-of-band telephony events, on the other side of the mixer.

Abstract: In a media server for processing data packets, media server functions are implemented by a plurality of modules categorized by real-time response requirements.