[Coco] Coco Modem phone line connection

[Dave Philipsen]

Actually you can talk full duplex on two telephones by simply connecting 
them both to the same relatively high impedance power supply. I think 
time division multiplexing is what allows multiple signals 
(conversations) to share the same path or pair of wires.

Dave


On 11/30/2019 8:43 PM, Joel Rees wrote:
> Time multiplexing, as I understand it.
>
>
> 2019年11月20日(水) 13:39 Dave Philipsen <dave at davebiz.com>:
>
>> Yes, in much the same way in which one line allows you to both speak and
>> listen at the same time (full duplex) using a standard voice telephone.
>>
>> Dave
>>
>>> On Nov 19, 2019, at 10:43 AM, rietveld rietveld <rietveldh at hotmail.com>
>> wrote:
>>> Does one line do both receive and send of the data?
>>>
>>> Sent from my BlackBerry
>>>   Original Message
>>> From: Gene Heskett
>>> Sent: Tuesday, November 19, 2019 11:25 AM
>>> To: coco at maltedmedia.com
>>> Reply To: CoCoList for Color Computer Enthusiasts
>>> Subject: Re: [Coco] Coco Modem phone line connection
>>>
>>>
>>>> On Tuesday 19 November 2019 11:17:10 rietveld rietveld wrote:
>>>>
>>>> It looks like the coco only uses the middle two wires(red and green)
>>>> on a four line phone cord.   Is this correct?
>>>>
>>> Probably, since thats all it takes to run a telephone.
>>>
>>>> Sent from my BlackBerry
>>>
>>> Cheers, Gene Heskett
>>> --
>>> "There are four boxes to be used in defense of liberty:
>>> soap, ballot, jury, and ammo. Please use in that order."
>>> -Ed Howdershelt (Author)
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>>> - Louis D. Brandeis
>>> Genes Web page <http://geneslinuxbox.net:6309/gene>
>>>
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>>
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