Importance

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Abstract

The invention concerns a device for use in establishing telephone conference calls, the object of the device being to enable an originating subscriber to connect a plurality of telephone exchange lines in parallel to provide a conference connection, utilizing existing telephone exchange switching facilities which do not necessarily provide for conference connections. The device comprises a so-called conference bridge, and switching means responsive to incoming command signals transmitted from a remote telephone station for connecting the remote caller either to an outlet to a telephone exchange line capable of receiving dialled switching signals for establishing a switched connection to a called party, or to an inlet port of the conference bridge. The logical functions of the switching means are so interrelated that solely in response to incoming command signals connections can be dialled in succession from outgoing exchange lines to called parties, the established connections subsequently being held in connection with the conference bridge, to which the remote calling party can then establish a connection for completion of the conference call.

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First Claim