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421 results about "Cordless" patented technology

The term cordless is generally used to refer to electrical or electronic devices that are powered by a battery or battery pack and can operate without a power cord or cable attached to an electrical outlet to provide mains power, allowing greater mobility. The term "cordless" should not be confused with the term "wireless", although it often is in common usage, possibly because some cordless devices (e.g., cordless telephones) are also wireless. The term "wireless" generally refers to devices that use some form of energy (e.g., radio waves, infrared, ultrasonic, etc.) to transfer information or commands over a distance without the use of communication wires, regardless of whether the device gets its power from a power cord or a battery. The term "portable" is an even more general term and, when referring to electrical and electronic devices, usually means devices which are totally self-contained (e.g., have built-in power supplies, have no base unit, etc.) and which may also use wireless technology.

Cordless RF range extension for wireless piconets

Cordless telephone technology provides a long range and highly sophisticated wireless extension between a plurality of wireless piconet networks. In one embodiment, base units of separate cordless telephones include respective piconet front ends (e.g., Bluetooth protocol bearing RF front ends) in addition to the otherwise conventional RF front end. The piconet-capable base units are placed and made members of separate piconet networks, but within conventional cordless telephone range of one another, e.g., within one mile of one another. To allow communications between piconet devices on the separate wireless piconet networks, the cordless telephone base units pass piconet content information (i.e., the messages passed by a piconet device on a first piconet network including a first cordless telephone base unit intended for receipt by another piconet device on a second piconet network serviced by the other cordless telephone base unit. In another embodiment, a base unit of a cordless telephone is made a member of a first wireless piconet network while its remote handset is made a member of a second wireless base unit, and piconet content information is passed from a device on one wireless piconet network to another device on the other wireless piconet network over the wireless cordless telephone (e.g., 900 MHz or 2.4 GHz range) channel established between the cordless telephone base unit and its remote handset.
Owner:LUCENT TECH INC

Method and apparatus for over-the-air activation of neighborhood cordless-type services

A method for providing a local cordless-type service comprises the steps of receiving subscriber neighborhood zone selection input so that a mobile telephone equipped subscriber may place or receive calls for a fixed rate, for example, per month without having to pay radio frequency air time charges any time they are located within their selected subscribed-to zones. If the subscribed-to zones are adjacent to one another and the mobile subscriber roams from one zone to another, the subscriber may continue their free call uninterrupted and without paying air time charges. However, when the subscriber roams outside their subscribed-to zones they may be switched from the present local cordless-type services to conventional personal communications services and pay air time charges. However for an active call, no air-time charges are incurred as the user transitions between the cellular/DPCS environment and the local cordless service environment. Associated apparatus comprises an IBS for automatically changing radio frequency channels as the subscriber roams within a subscribed-to neighborhood zone, roams to another subscribed-to zone or roams outside a subscribed-to zone. Subscribers may choose to use their mobile identification number, their current directory telephone number for wired public switched telephone service or obtain a new directory number. Subscribers can actuate their service over-the-air automatically without service personnel assistance from their home neighborhood zone.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Method and apparatus for an improved call interrupt feature in a cordless telephone answering device

A telecommunication device comprising a base unit and a cordless handset, wherein said telecommunication device is operable in a plurality of modes of operation. The base unit includes: (1) a ring signal detection module communicatively coupled to a telephone network; (2) a voice communication channel also communicatively coupled to said telephone network; (3) a wireless communication transmitter module; (4) a wireless receiver module; and (5) a controller for executing program instructions. The cordless handset includes: (1) a ringer module; (2) an ear piece; (3) a microphone; (4) a talk request command input device; (5) a wireless communication transmitter; and (6) a wireless communication receiver. The modes of operation include a talk request mode of operation, wherein (1) a ringing signal is received at said base unit; (2) said base unit transmits a wireless signal to said cordless handset; (3) said cordless handset receives said wireless signal; from said base, and initiates said local ringer module; (4) said base unit counts a predetermined number of rings; (5) said base unit initiates an off-hook condition in response to detection of a predetermined number of rings; (6) an outgoing message (OGM) is played at said base unit; (7) actuation of said talk request command input device is detected; (8) said base unit receives a wireless talk request signal (TRS) from said cordless handset, initiates an OGM end detection means, and continues to play said OGM; and (9) upon detection of end of said OGM by said OGM end detection means, said base unit inhibits the start of an incoming message (ICM) means and connects the calling party with the called party at said cordless handset.
Owner:HENDERSON DANIEL A

Digital cordless communication system with frequency deviation correction capability

A digital cordless telecommunication system capable of maintaining the enhanced frequency stability of radio transmission signals from stationary base stations by use of a specific clock signal including either a high-precision clock or a reference clock as generated by main equipment. In this system the main equipment is provided with a high-precision oscillator that generates and issues a clock signal with increased pulse-phase accuracy, whist a respective one of the base stations is with a line interface for extraction of such high-precision clock signal from the high-precision oscillator, a reference oscillator which supplies a reference clock to a frequency synthesizer that generates a local oscillation signal, a frequency error detector operable to detect a difference or "error" in frequency between the reference clock of the reference oscillator and the high-precision clock of the line interface, and a reference oscillator controller which is responsive to receipt of the error signal from the frequency error detector for adjusting any possible frequency deviation of the reference oscillator causing the reference clock frequency of the reference oscillator to keep track of the frequency of the high-precision clock signal.
Owner:PANASONIC CORP
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