Telephone

The Telphone is a electric device used in Republic City to make make long distance conversations.

History
The first seen telephone was seen in the episode of The Legend of Korra, The Aftermath when Hiroshi Sato was seen talking to a Equalist on the phone in his office.

Another time a Telephoe was seen was in the episode Out of the Past when Tenzin was talking to someone on the telephone about founding Korra.

Design
Telphones seems to come in just two many design forms.

Candelstick-2 part phone with speaker on one part and microphone on a candelstick like tube along with a dialer.

Rotary Dialer-A 2 part phone with mic and speaker on one end and a dialer on a box like form.