[GreenKeys] OT - rotary dial telephone specs

[Sam Hallas]

gil at baudot.net wrote:
> So my question is what was the design standard for a dial phone's
> pulse-widths?  They both work just fine on my Centurylink landline, and
> I dialed up my cell phone and left myself a message with each phone.
> Perfect dialling and audio sounded good in both directions too.

It depends on the switching system, but the timing for the Strowger 
step-by-step switches used here in the UK was 66 ms break to 33ms make 
at 10 pulses per second.

I can't remember what the inter-digit pause is supposed to be. I'd have 
to look it up.

Cheers,
Sam