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A jazz musician named Teri Pall invented a version of the cordless phone in 1965 but could not market her invention, as its 2-mile (3.2 km) range caused its radio signals to interfere with aircraft communications. In 1968, she sold her rights to the cordless phone to a manufacturer who modified it for practical use.
There are two basic types of landlines. A corded landline is one that connects to the provider's cabling through a wall jack. The phone base and the receiver (or handset) are connected by a cord. In a cordless landline, the phone base connects to the cabling through a jack but the handset is connected wirelessly. The cordless phone's range is short, basically within the premises. Cordless landlines must also be plugged into the building's electrical system, which means that -- unlike corded landlines -- they don't function in power outages.