How has telephones changed over time?

Answer 1

WOW. That's a study in electronics history that I could write a book on. Ignoring ol' Alex Bell, lets start when a phone had a crank powered ring generator (some "field" phones still use them yet today) and that "rang" the local "switch board". You would then tell the operator what number you wanted (or "who" since in many cases you could just give her a name) and she would "patch" your phone line to the one you were calling by plugging a cable from your "jack" to the jack of the other phone.
Some time later we went to rotary dialing and PBX switching.
Next came tone dialing and EPBX systems. Now we have wireless systems with computer operated electronic patch board systems CEPBX that can send via towers and/or satellite at blistering digital speeds (called "packet"). All the earlier systems used analog voice transmission. We now use digital and then a computer chip (in the phone) converts the digital signal back to analog.

Answer 2

Dusty is right, it really came a long lonng loong way crossing the oceans of the continents and then flying high up over our skys till now travelling to planets and back

Answer 3

Yes.

It started with analogue corded black phone set.

Then it came analogue corded with phone sets, in many colors and shapes (like Mickey Mouse).

Then it came cordless analogue.

Then it came cellular analogue.

Then it came cordless digital.

Then it came cellular digital.

Now it comes Internet phone.

Other variations that appeared at various time: video phones, camera phones, multi-line phones, answering machines, satellite phones, etc

Too much to write in a paragraph or two.

Answer 4

did you ever see the old movie with people talking on those phones on the wall saying "HELLO HELLO CAN YOU HEAR ME HELLO?" then in the latter part of the last century the phones worked perfectly. now you see people on cell phones saying"HELLO HELLO CAN YOU HEAR ME HELLO?"