Handsfree communication control method, portable radio...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Reexamination Certificate

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Details

C455S569200, C455S041200

Reexamination Certificate

active

07430441

ABSTRACT:
A channel disconnection detecting unit detects whether a voice channel is disconnected by an AG or by an HF. When the voice channel is disconnected by the AG, an AG control unit controls a modulation/demodulation unit to maintain a connection of the AG with a BS and a switching unit switches a voice signal to an AG speaker and an AG microphone. When the voice channel is disconnected by the HF, the AG control unit controls the modulation/demodulation unit to interrupt the connection of the AG with the BS.

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“Specification of the Bluetooch System; Profiles, Version 1.1; Part K;6; Headset Profile” Specificaiton of the Bluetooth System, Feb. 22, 2001, pp. 197-226, XP002277008.
Bluetooth Hands-Free Profile Application Guideline, CCAP, Jun. 20, 2003, title page and p. 87.

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