Portable telephone apparatus

Portable telephone apparatus

When the portable telephone apparatus receives a termination call and a call signal (or a ringing signal), the speaker generates a ringing tone. At this point, the user hears the ringing tone and holds the ear piece to his or her ear. At this point, the speaker impedance variation detecting portion...

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1. Verfasser: NAKANO RUMI
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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description When the portable telephone apparatus receives a termination call and a call signal (or a ringing signal), the speaker generates a ringing tone. At this point, the user hears the ringing tone and holds the ear piece to his or her ear. At this point, the speaker impedance variation detecting portion detects the variation of the impedance corresponding to the variation of the volume of the space between the speaker and the ear piece. When the impedance variation detecting portion detects the variation of the impedance, it outputs an impedance variation detection signal. When the controlling portion receives the impedance variation detection signal, it performs a response process for the termination call or a hold cancel process for a call.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
title Portable telephone apparatus
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