[rollei_list] Re: old phone numbers

  • From: "Peter K." <peterk727@xxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Thu, 22 Jan 2009 12:05:02 -0800

Richard, Strowger was the oriignal sold them to AE and that company was
bought by GT&E now Verizon. So now you know.

On Thu, Jan 22, 2009 at 10:16 AM, Richard Knoppow <dickburk@xxxxxxxxxxxxx>wrote:

> ----- Original Message ----- From: Peter K.
> To: rollei_list@xxxxxxxxxxxxx
> Sent: Thursday, January 22, 2009 8:26 AM
> Subject: [rollei_list] Re: old phone numbers
> They changed from 6 to 7 digits to accommodate growth. Use of names were
> common in various parts of the world but the study I referred to was for
> North America. The Direct Distance dialing started in NJ in 1951. But it was
> slow to grow as the equipment in the tel offices around the country were
> mechanical and had to be upgraded or replaced to accommodate DDD.
> Area codes were interesting the way they were assigned. You may know but
> the reason LA and NY had 212 and 213 is that the numbers were originally
> assigned by population. The middle digit is the most noticeable as 1 was for
> populated cities or states, and 0 for less populated like NJ 201 or
> Washington DC 202. So when you dialed on a rotary phone (the patent of which
> was owned by GT&E and a major reason Bell developed touch tone) it was
> shorter to dial the area code for NY which was 212 than say South Dakota 605
> or New Mexico 505.
> But all this is history and the understanding of which is long gone.
> Peter K
>   I just looked at the 1927 film on how to dial a phone. The phone numbers
> are all numerals and the dials shown do not have letters on them. I am not
> sure when exchange names came into use for dial phones.
>   All dial central offices used mechanical switching until the introduction
> of electronic switches about twenty years ago. The Hollywood CO used the
> same Stroger step-by-step switches until they were replaced by an electronic
> switch around 1990. There were never any cross-bar switches there. It was
> either the first, or one of the earliest dial central offices in Los
> Angeles.
>   AT&T used tone dialing internally for LD for some years before direct
> dialing was offered to private subscribers. I don't think it was the
> switches but rather other aspects of the system that had to be made uniform
> before direct dialing long distance could be implemented.
>   There are a number of patents on telephone dials and on dial central
> systems. GTE did not exist when dial phones were introduced but its
> predecessors did. I am not sure who patented the first practical dial system
> but attempts go back to the 1880's, that is, nearly to the beginning of
> commercial telephone service. Early dial offices used mostly the Stroger
> system but there were others. For instance, in Europe, the Erickson company
> built some very early dial machines.
>    I think tone dialing was mostly developed to increase accuracy and
> decrease operator fatigue. The BSTJ or Bell Labs Record would have most of
> the history but I have no easy access to them. There may even be articles on
> the web, I haven't looked.
>    Tone dialing has been around long enough that some young people may not
> know how to work a dial phone, maybe the old movies will be of use again
> after some eighty years.
> --
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
> ---
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Peter K

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