The Carterfone is a device invented by Thomas Carter. It manually connects a two-way mobile radio system to the public switched telephone network (PSTN), making it a direct predecessor to today's autopatch. The device was acoustically, but not electrically, connected to the public switched telephone network. It was electrically connected to the base station of the mobile radio system, and got its power from the base station. All electrical parts were encased in bakelite, an early plastic.
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- The Carterfone is a device invented by Thomas Carter. It manually connects a two-way mobile radio system to the public switched telephone network (PSTN), making it a direct predecessor to today's autopatch. The device was acoustically, but not electrically, connected to the public switched telephone network. It was electrically connected to the base station of the mobile radio system, and got its power from the base station. All electrical parts were encased in bakelite, an early plastic. When someone on the CB radio wished to speak to someone on phone, or "landline" (eg, "Central dispatch, patch me through to McGarrett"), the station operator at the base would dial the telephone number. When callers on the radio and on the telephone are both in contact with the base station operator, the handset of the operator's telephone is placed on a cradle in the Carterfone device. A voice-operated switch in the Carterfone automatically switches on the radio transmitter when the telephone caller is speaking; when he stops speaking, the radio returns to a receiving condition. A separate speaker is attached to the Carterfone to allow the base station operator to monitor the conversation, adjust the voice volume, and hang up his telephone when the conversation has ended.
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- The Carterfone is a device invented by Thomas Carter. It manually connects a two-way mobile radio system to the public switched telephone network (PSTN), making it a direct predecessor to today's autopatch. The device was acoustically, but not electrically, connected to the public switched telephone network. It was electrically connected to the base station of the mobile radio system, and got its power from the base station. All electrical parts were encased in bakelite, an early plastic.
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