Importance

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Abstract

A method to establish a speech conference connection between a group of conference participating nodes (2,4,8) which can freely be selected among a greater plurality of nodes (2-9) having conference facilities, and which can be interconnected by at least one telecommunication network (1) having at least one switching exchange (10) for establishing at least one conference ring. Conference participating nodes are provided with completely identical designs so that each node (2,4,8) can perform all signal processing including amplification and speech-coding/decoding in a decentralized manner, while routing and switching of information takes place in the at least one network exchange (10). All the conference participating nodes (2,4,8) are connected in series in a conference ring, which only includes these conference participating nodes (2,4,8) for each new conference ring to be established. Digitally represented sound information is sent from an active sending node acting as one of the conference participating nodes (2,4,8) to other conference participating nodes. The digitally represented sound information is subjected to no other signal processing than ordinary copying in each node. The digitally represented sound information is circulated in the conference ring before it returns back to the active sending node. The digitally represented sound information is deleted in the active sending node.

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First Claim