Editing Telephone (section)

==Cordless telephones==
{{main|Cordless telephone}}
[[File:Motorola 4050a-2.jpg|thumb|A cordless telephone system consisting of a handset resting on a base station (left) and a second handset resting on a battery charger unit (right)]]
A '''[[cordless telephone]]''' or '''portable telephone''' consists of a [[base station]] unit and one or more portable cordless [[handset]]s. The base station connects to a telephone line, or provides service by voice over IP (VOIP). The handset communicates with the base station via [[radio frequency]] signals. A handset's operational range is limited, usually to within the same building or within a short distance from the base station.

===Base station===
Base stations include a radio transceiver which enables full-duplex, outgoing and incoming signals and speech with the handsets.  The base station often includes a microphone, [[audio amplifier]], and a loudspeaker to enable hands-free [[speakerphone]] conversations, without needing to use a handset. The base station may also have a numeric keypad for dialing, and a display for [[caller ID]]. In addition, answering machine function may be built in.<ref name=Freudenrich4>{{Cite web|url= http://electronics.howstuffworks.com/cordless-telephone3.htm|title= How Cordless Telephones Work|last= Freudenrich|first= Craig|website= HowStuffWorks|publisher= InfoSpace Holdings|date= 2000-12-11|access-date= 2022-08-07|language= en|archive-date= 2022-08-08|archive-url= https://web.archive.org/web/20220808123301/https://electronics.howstuffworks.com/cordless-telephone3.htm|url-status= live}}</ref>

The cordless handset contains a [[rechargeable battery]], which the base station recharges when the handset rests in its cradle. Muilt-handset systems generally also have additional charging stands.  A cordless telephone typically requires a constant [[mains electricity|electricity supply]] to power the base station and charger units by means of a DC transformer which plugs into a wall AC power outlet.<ref name=Freudenrich4 />