This is a device which was invented by Thomas Carter. It connects a two-way mobile radio system to the Public Switched Telephone Network (PSTN). The base station of the mobile radio system supplied electrical power for it. Thomas Tom F. Carter was the inventor of the Carterfone, a privately-manufactured radiophone that would strike the first blow against AT&Ts then-monopoly. ... The public switched telephone network (PSTN) is the concentration of the worlds public circuit-switched telephone networks, in much the same way that the Internet is the concentration of the worlds public IP-based packet-switched networks. ...

It was electrically connected to the base station of the mobile radio system, and the electrical parts were encased in bakelite. When someone on the radio wished to speak to someone on phone, or "landline", the station operator at the base would dial the number and place the handset on the Carterfone. The device was therefore acoustically connected to the Public Switched Telephone Network, and did not have the capacity to damage the PSTN. Bakelite distributor rotor Bakelite is a brand named material based on the thermosetting phenol formaldehyde resin polyoxybenzylmethylenglycolanhydride, developed in 1907-1909 by Dr. Leo Baekeland. ...

This particular device was involved with a landmark United States legal decision as related to telecommunications; see Thomas Carter. BlackBerry 7100t Telecommunication refers to the communication of information at a distance. ... Thomas Tom F. Carter was the inventor of the Carterfone, a privately-manufactured radiophone that would strike the first blow against AT&Ts then-monopoly. ...

See also

• Hush-a-Phone v. FCC

References

• Full text of FCC Carterfone decision