TELECOM Digest OnLine - Sorted: Re: Dial/Touch Tone Speeds (was Re: Bell Divestiture)

Re: Dial/Touch Tone Speeds (was Re: Bell Divestiture)
Sat, 25 Jun 2005 11:36:18 -0700

Robert Bonomi wrote:

> In article <>,
> <> wrote:

>> Would anyone remember in what year dual-mode phones (keypad with a
>> little switch to convert to pulse if necessary) came out in wide
>> quantity? I think that was around the time they stopped using real
>> ringer bells. My guess is the late 1980s.

> Third-party manufacturers of phones for direct attach to the PSTN
> offered it from nearly day one. That way you could have th 'fancy
> looking' push-button phone _without_ having to pay the telco extra
> every month for Touch-Tone(tm) service.

I recall a few models that only did DP, but with buttons like a DTMF
pad. The far more common application, though, was a phone with a DTMF
pad, but could be switched between DTMF and DP. There were still
pockets of switches around until into the 1990s that could not handle

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