Externally attached handset of an end terminal used for mobile communication systems
First Claim
1. An externally attached handset, connected between an end terminal of a mobile communication system having a speaker/microphone terminal by which an externally attached speaker and microphone are connected and a data communication end terminal connected to the end terminal of the mobile communication system via the speaker/microphone terminal, which handset comprises:
- a speaker signal line connecting said end terminal of said mobile communication system to said data communication end terminal via said speaker/microphone terminal;
a microphone signal line connecting said end terminal of said mobile communication system to said data communication end terminal via said speaker/microphone terminal;
a speaker, connected to said speaker signal line, converting a signal on the speaker signal line into an audio sound;
a microphone, connected to said microphone signal line, converting a sound into a sound signal and supplying the sound signal to said microphone signal line;
detecting means for detecting a called station identification signal and a data communication signal including a data communication protocol signal on said speaker signal line and on said microphone signal line; and
an on/off circuit device, connected between said microphone and said microphone signal line, disconnecting said microphone from said microphone signal line when said called station identification signal is detected by said detecting means on said speaker signal line or on said microphone signal line, said on/off circuit device reconnecting said microphone to said microphone signal line while said microphone is disconnected and when said data communication signal has not been detected by said detecting means for a predetermined period of time.
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Accused Products
Abstract
An externally attached handset connected between an end terminal of a mobile communication system and a data communication end terminal which handset is connected via a speaker/microphone terminal on the end terminal of the mobile communication system. The handset comprises a speaker, a microphone, a detecting device detecting a data communication signal, and an on/off circuit device which automatically disconnects a microphone from a microphone signal line when data communication is performed. The handset may further includes a display device which indicates that data communication is being performed.
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Citations
17 Claims
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1. An externally attached handset, connected between an end terminal of a mobile communication system having a speaker/microphone terminal by which an externally attached speaker and microphone are connected and a data communication end terminal connected to the end terminal of the mobile communication system via the speaker/microphone terminal, which handset comprises:
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a speaker signal line connecting said end terminal of said mobile communication system to said data communication end terminal via said speaker/microphone terminal; a microphone signal line connecting said end terminal of said mobile communication system to said data communication end terminal via said speaker/microphone terminal; a speaker, connected to said speaker signal line, converting a signal on the speaker signal line into an audio sound; a microphone, connected to said microphone signal line, converting a sound into a sound signal and supplying the sound signal to said microphone signal line; detecting means for detecting a called station identification signal and a data communication signal including a data communication protocol signal on said speaker signal line and on said microphone signal line; and an on/off circuit device, connected between said microphone and said microphone signal line, disconnecting said microphone from said microphone signal line when said called station identification signal is detected by said detecting means on said speaker signal line or on said microphone signal line, said on/off circuit device reconnecting said microphone to said microphone signal line while said microphone is disconnected and when said data communication signal has not been detected by said detecting means for a predetermined period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An externally attached handset, connected between an end terminal of a portable radiotelephone having a speaker/microphone terminal by which an externally attached speaker and microphone are connected and a facsimile machine connected to the portable radiotelephone via the speaker/microphone terminal, which handset comprises:
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a speaker signal line connecting said portable radiotelephone to said facsimile machine via said speaker/microphone terminal; a microphone signal line connecting said portable radiotelephone to said facsimile machine via said speaker/microphone terminal; a speaker, connected to said speaker signal line, converting a signal on the speaker signal line into an audio sound; a microphone, connected to said microphone signal line, converting a sound into a sound signal and supplying the sound signal to said microphone signal line; detecting means for detecting a data communication signal and a data communication protocol signal, including a communication-start protocol signal and a communication-end protocol signal, on said speaker signal line and on said microphone signal line; and an on/off circuit device, connected between said microphone and said microphone signal line, disconnecting said microphone from said microphone signal line when said communication-start protocol signal for facsimile communication is detected by said detecting means, connecting said microphone to said microphone signal line when said communication-end protocol signal is detected by said detecting means, said on/off circuit device reconnecting said microphone to said microphone signal line while said microphone is disconnected and when said data communication signal has not been detected by said detecting means for a predetermined period of time. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification