- Jan 12, 2011
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I'm not sure if this is the right area to post this in but I had a question about the Hands free devices in cars for cellphones during the 90s. I wanted to know how these systems integrated into the stereo and or speaker system. I know like on Lexus LS400 there was a control box in the back, an antenna hookup and a hookup in the car stereo so that when a call is accepted, it mutes the stereo and you can hear the user on the other end. But what about for aftermarket setups? Does anybody know of any particular models that did this like for a Nokia 6110 or an earlier classic phone. There was a base station that would continuously charge the phone but soon as you accepted the call, the call could be heard through the car speakers.