Does anybody know or have a good resource that relates to "how an analog phone line works" (graphs, circuits...)? Thank you so much!

 

Google "plain old telephone service". I don't think there is much mystery inherent in sending an analog signal down a wire, though. Bell Labs work on switchgear and such was quite important in developing modern communications theory.

 

http://communication.howstuffworks.com/telephone.htm has some interesting information about ordinary telephone operation as well.

hgmjr

 

If you want a book the

Telephone Installation Handbook

by Sterve Roberts and published by Newnes

has good information.

Earlier editions can be had very cheaply and contain all you rrequire.

 

Google "plain old telephone service". I don't think there is much mystery inherent in sending an analog signal down a wire, though. Bell Labs work on switchgear and such was quite important in developing modern communications theory.

Actually, you'd be amazed at what they accomplished even on the analog level. Concepts of multilayer phantom circuits (phantoms of phantoms!), bidirectional (hybrid) amplifiers, line loading, time domain reflectometry......all stuff they knew about before the 1920s! Fascinating and, in my opinion, REQUIRED, reading for any electronics technician.

eric

 

Actually, you'd be amazed at what they accomplished even on the analog level. Concepts of multilayer phantom circuits (phantoms of phantoms!), bidirectional (hybrid) amplifiers, line loading, time domain reflectometry......all stuff they knew about before the 1920s! Fascinating and, in my opinion, REQUIRED, reading for any electronics technician.

eric

Oh, yes...I forgot....in 1928, they had a system of time division multiplexing using MECHANICAL commutators! It was actually deployed in parts of New York.

eric