Difference between telephone network and internet?

Both are almost similar except internet service is more powerful than telephone network in a sense it never looses its ability to reach and you can even send ur messages to someone not online.. mean offline messages e-mails, attachment and much more..

there is difference in the hardware used between, in telephone we use telephone switches at central office but in internet more powerful and intelligent devices are used like layer 3 and layer 2 devices such as router, layer 3 switches, gateways etc

hope u understand