Re: Need advice on cellphone hookup in A4

["frontstage" <frntstg9@allinux1.alliance.net>]

uhhhhhhh...i'm not sure about that...as an Ameritech employee (splicing
technician), i can tell you that red is ring(+) and green is tip(-)
frntstg9@mail.alliance.net

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> From: Byas U Nambisan <Byas_U_Nambisan@ccm.fm.intel.com>
> To: quattro@coimbra.ans.net; dan_masi@MENTORG.COM
> Subject: Need advice on cellphone hookup in A4
> Date: Monday, October 28, 1996 6:42 PM
> 
> Dan,
> I would like to hook my Ericsson cellphone into the A4 jack (if 
> possible).  I've seen postings from you on hardwiring your valentine and 
> cellphone to the car and would like your advice/inputs. My plan is as 
> follows:
> 
> Assumptions:
> 1. The A4 jack is of the std telephone connector type (WJ11?) with four 
> wires.  The green is +ive and red is ground.  That would leave the other 
> two for speaker and microphone.  
> 
> 2. The Auto mute is a function of the Delta system such that it mutes 
> when it senses a activity on the microphone/speaker connections.  
> 
> 3. The Delta system provides the necessary amplification.  Impedance ??
> 
> Plan:
> I have a speaker/mic connection for my cell.  I was planning to splice 
> the audio and power connections to the telephone connector and plug it 
> into the car.  If the above assumptions are correct, I would still need 
> to figure out the connections on the adaptor:
> 
> White:    Mic? or Speaker? 
> Green:    +12V
> Black:    Mic? or Speaker?
> Red:      Ground
> 
> Would this work?  Would I be seriously damaging the Delta system if I 
> tried?  If anyone else on the list has any tips/info please feel free to 
> send them directly to me.  I will post a summary of the responses/result 
> if there is general interest.
> 
> Thanks,
> Byas