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JPS611980

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DESCRIPTION JPS611980
[0001]
Brief description of the drawings
[0002]
The first song is a block diagram showing an example of a conventional conference telephone
apparatus, and FIG. 2 is a block diagram showing an embodiment of the present invention. In the
figure, 1, 2: telephone line, 3: network controller, 4: data modulator / demodulator, 5: still image
processor, 6: telephone line connection device, 7: microphone signal mixing amplifier, 8: speech
power output amplifier 9: Microphone 10: Speech power 11: Switch 12: Controller 13:
Microphone signal mixing amplifier 14: Speaker output amplifier 15: Data transmission request
signal 16: Data transmission end signal 17: pilot signal 18: stereo monaural switching control
signal 19: pilot signal detection signal 20: second channel transmission signal line 21: first
channel transmission signal line 22: second channel reception signal line 23: 23 First channel
reception signal line 24: data / voice switching control signal.
10-05-2019
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