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When did the beeping tones you hear in a receiver when you pick up the phone or when the line is busy become a standard?

asked in phone, beep, tone

Answers

Kayce_1987 answers:

I'll say the 1980's possibly.


3 years ago / reply

nivetha answers:

The dial tone was introduced by Siemens in 1908 in germany.
I would guess the busy tone was standardised between 1890s and 1910s when automatic switching and telephone exchanges came about.
http://www.seg.co.uk/telecomm/automat1.htm


3 years ago / reply

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