Not sure if you mean on the client end or the phone company end. On the phone company end the move to digital tones instead of number of clicks. On the client end the Touch Tone phone made it's debut in 1963 although both protocols were in place on the phone company end for a very long time.
I just plugged in my 35 year old rotary Bell phone and it worked just fine for sending as well as receiving calls.
making phone calls
A rotary phone typically weighs around 5-7 pounds.
To move in a circle
One major piece of technology that was invented in 1919 was the rotary telephone.
I think it was the rotary phone
The only thing I can think of is the word "rotary". There are rotary engines and old rotary phones that had dials....hope this helps.
Rotary-Lift Aircraft
The spinning jenny was used to hand spun cotton in mills. It was replaced by the rotary steam engine.
The spinning jenny was used to hand spun cotton in mills. It was replaced by the rotary steam engine.
It was called a "rotary dial".
yes!
The digital technology replaced the analog technology and added support for text messaging.