[GreenKeys] OT - rotary dial telephone specs

[Richard Knoppow]

----- Original Message ----- 
From: "Jeffrey D Angus" <jdangus at att.net>
To: <greenkeys at mailman.qth.net>
Sent: Monday, June 03, 2013 6:39 PM
Subject: Re: [GreenKeys] OT - rotary dial telephone specs


> On 6/3/2013 4:23 PM, gil at baudot.net wrote:
>> Anyway, fun stuff.  In these days of disposable 
>> technology and
>> standards in the software world that change fluidly every 
>> few
>> months, it is really nice to find that my 80- and 90-year 
>> old phones
>> not only pass audio on today's landlines, but dial 
>> flawlessly as well.
>
> Well  yes. I have a Stromberg Calson original Candlestick 
> phone
> with dialer. It works just fine at the shop out here in 
> Ranger, TX.
>
> You'll note that ALL the subsequent phone stuff that was 
> introduced
> to the market after the "Carterfone lawsuit" was based on 
> the
> -48VDC open and 6-10 mA closed line imepdances and 120 VAC
> 22 Hz ringer signal.
>
> Ah indeed, backwards compatibility for over 100+ years.
>
> Jeff-1.0
> wa6fwi
>
>
    It seems to me that a great deal of information is to be 
found in military handbooks for telephone equipment. The 
government bought Western Electric and other dial equipment. 
The standards must be in those handbooks somewhere.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com