| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission level adjustment method for a voice confer ence system that can adjust a voice level of a conference opposite party even during a phone conference. SOLUTION: Phone conference terminals 6 of stations A, B are connected by a telephone network 10 (a public telephone line or a private telephone line), and the station A is provided with a control signal transmission circuit 1 that outputs a transmission level adjustment signal by an operation entry of a dial key being a user interface to adjust a transmission level of the station B, a level adjustment signal detection circuit 2 that detects the transmission level adjustment signal from the station B, a transmission level control circuit 3 that receives a signal detected by the level adjustment signal detection circuit 2 to apply adjustment control to the transmission level, a voice signal branching coupling circuit 4 that has a transmission level adjustment function controlled by the transmission level control circuit 3 and a plurality of headsets 5.
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