Conference call device

Abstract

Abstract PURPOSE:To form a conference call device where the conversation of 1:n is possible from any of terminals which are so connected that an optional terminal can request the transmission right with all connection lines set to the neutral state by the abandonment of the transmission right of an originating terminal. CONSTITUTION:When a selecting signal indicating conference communication service request is sent from a terminal 10, an exchange 2 hunts a conference call device 3, and when a call signal is transmitted to a line 40, the device 3 detects this call signal to return a confirmation signal to the exchange 2, thus connecting the terminal 10 and the path 40. Next, when the selecting number from the terminal is received by a receiving circuit 32, plural lines 41-4n and terminals 11-1n are connected by a control circuit 33, and the conference call device 3 defines the originating terminal 10 as the owner of the transmission right, and the message from the terminal 10 is stored in a storage circuit 35 and is sent to terminating terminals 11-1n form the circuit 33. When an abandonment signal is detected by a monitor circuit 36 for transmission right abandonment signal, all connection lines are set to the neutral state, and a character monitor circuit 37 gives the transmission right to the terminal of a line on which the transmission right request signal is detected first.

Inventors

• 👤 Hiroyuki Sugano

Bibliographic Details