1 to 3 digits.
http://www.scils.rutgers.edu/~dalbello/FLVA/infrastructure/infoinfra/telephone/index.html#directory
Here is a copy of the 1900 Madison, Wisconsin, phone directory. Christian Frautschi's number is listed along with his occupation. Callers would asked for Madison and then number 315.
http://www.scils.rutgers.edu/~dalbello/FLVA/infrastructure/infoinfra/telephone/frautschi.jpg
zoom in shot:
http://www.scils.rutgers.edu/~dalbello/FLVA/infrastructure/infoinfra/telephone/closer.gif
First long-distance telephone line was created in 1877.
The first transcontinental telephone line was joined at Wendover, Utah, in 1915
The first telephone was installed in 1878. It was invented by Alexander Graham Bell, and was installed by Richard Johnson.
First Telephone line was installed between Kaiaipoi and Addington in 1877. In 1878, the first commercial telephone service, using a privately built line in Christchurch. The first public manual exchange was installed in Christchurch in 1881.
1876
The first transcontinental telephone line was completed on January 25, 1915, connecting the East Coast to the West Coast of the United States. It allowed for direct communication between the two coasts and marked a significant milestone in telecommunications history.
Isaiah Broderson
You can use an in-line coupler to extend a telephone line.
The longest telephone line in the world was the first trans-Atlantic cable, stretching from New England to Nova Scotia after the invention of the telegraph by Alexander Graham Bell.
fibre optic cable !
first modem will be modulating electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone line and demodulated by another modem at the receiver side to recover the digital data.
(888) 611-5500 (toll free)