Matches 1 - 50 out of 89 1 2 >
Match Document Document Title
7174003 Method and system for troubleshooting a security system's telephone lines  
A system and method of troubleshooting a communication connection for a remotely located security system is disclosed. A communication line test unit is incorporated into the remote security system...
7113578 Vandal proof intercom system for apartment buildings  
An electronic apartment station intercom unit, housed in a vandal proof enclosure, providing a means for a tenant to communicate with apartment building main entrance door panel and means to unlock...
7085361 Methods and systems for communication from an exterior of a location  
Methods and systems for allowing communication between an exterior and an interior of a location, or a person associated with the location. A device positioned exterior to the location is connected...
7065196 Entrance intercom system  
An entrance intercom system comprises the following elements. A data base is applied to store the resident codes, the phone numbers and the identity recognizing codes of the residents. A...
7046774 Intercom apparatus  
An intercom apparatus has a main line connecting intercom master stations in respective residential rooms. Each master station has a terminal unit which is separate from and removable from the...
7023982 Telephone plug system  
A telephone plug system includes a jack body having one end adapted to be inserted into standard wall telephone jacks, having at least one receiving socket at another end adapted to receive a...
7023975 Privacy mode system and method for home network telephone  
A system and method are provided for controlling communications privacy in a Home Network telephone system. The method comprises: using a gateway to send and receive calls on at least one external...
7013000 MTA intercom feature  
The present invention provides a media terminal adaptor having an internal logical interface to permit communication connections to be established between ports of the MTA.
6947534 Telephone intercom methods and systems  
Embodiments of the present invention relate to systems and methods for providing an intercom service. In an embodiment of the present invention, an intercom service request is received. The...
6888934 Vehicle intercom system  
A vehicle intercom system allows conversation between individuals located, respectively, inside and outside of a vehicle. The voice units are linked by a vehicle controller area network eliminating...
6882715 Method and apparatus for communication with a gate entry controller and providing secure communication  
A security system and method is disclosed for use with a security gate entry system that uses a telephone or other communication system at a security gate for communication by a person seeking...
6879670 Collective housing intercom apparatus  
The invention makes it possible to call a resident of collective housing even when the apartment number of the resident is unknown. A collective housing entrance substation is connected to...
6711238 Parallel-connected dialing signal transmission inhibiting device for data transfer over a telephone link  
A parallel-connected dialing signal detection and transmission-inhibiting device is disclosed which detects dual-tone multi-frequency dialing signals across tip and ring conductors of a telephone...
6674844 System for providing modem access via an IR interface in a PBX  
A telephone set of a telephone system is provided with an infrared interface. This infrared interface is able to communicate with an infrared port on a local computer. The computer is configured to...
6671360 Intercom system for a building or apartment house  
An intercom system for a building or apartment house includes at least one main entrance station 1 which is installed at an entrance or the like of a building or an apartment house, a plurality...
6631179 Voice and motion activated telephone  
A method and system for communicating without use of manual contact with a communications unit. The user approaches a communications system and can activate a communications unit by a...
6574312 Electronic patch panel apparatus and method of use  
The apparatus of the present invention comprises an electronic patch panel controller apparatus for use in environments where multiple internal handset lines share connectivity to a lesser number...
6539085 Automatic phone line re-allocation  
For single line telephone service, let red/green denote a pair that is connected to the central office, and yellow/black denote an unused pair, but which also appears at the connections to the...
6438221 Electronote wall mounted messaging device  
A wall-hung or shelf situated free-standing voice memorandum system allows an individual to record a message for another member of the household. the system can be used in connection with a...
6400815 Method and apparatus for subscriber line to telephone call distribution  
A Network Interface Unit ( 38, 38′, 38″ ) routes incoming calls to, and outgoing calls from, a plurality of telephone sets ( 12-22 ) at a subscriber premises ( 24 ). The Network Interface Unit...
6240171 Call controlling apparatus and method used for an order-wire system in a communication system  
A call controlling apparatus for receiving input signals each including a phone number through respective communication channels and making a call. The apparatus provides a plurality of telephones...
6078653 Integrated telephone intercommunication and alarm electronic controller  
A telecommunication and alarm system for connection to: a four-wire or two-wire telephone network, a two-terminal doorphone unit, and one or more alarm detectors connected in parallel COMPRISING ...
5956631 Multiple terminal device ringing digital subscriber ISDN terminal  
A telephone communication system addresses calls to a particular subscriber via both a wired terminal and through the wired terminal by radio to a wireless communicator device. The wired terminal...
5923743 Single-wire data distribution system and method  
A single-wire telephone distribution system is directed to use in passenger aircraft. It includes a set of twisted pair cables, electronics distribution boxes and repeaters. A single-wire...
5818918 Personal handy phone system  
In a personal handy phone system, a private PHS base station is communicable with both a private PHS terminal and a public PHS terminal. The private PHS base station intermittently transmits and...
5668870 Audible signaling device for informing when a telephone line is available or in use  
A device is provided for connection to a shared telephone line for detecting and audibly indicating the on-hook and off-hook status of the line. The device includes sensing and changing circuitry...
5506896 Intercommunication system  
An intercommunication system for transmitting signals through a door, and having piezo transducer devices mountable on each side of the door, a matrix of analog switches connecting the piezo...
5148468 Door answering system  
A door answering system is described for enabling the occupant of a structure (e.g., house, apartment, etc.) to provide a pre-recorded message to a visitor who has approached the entrance of the...
5125026 Internal telephone intercom system  
An internal telephone intercom system including means for connecting to a dedicated telephone communication line, a plurality of telephone sets connected to the line and adapted for telephone...
5040207 Two-telephone intercom  
A two-telephone intercom has a simple station-call signalling system. In the preferred embodiment, each telephone is provided with its own respective signalling unit comprising (a) a dc voltage...
5031210 Telephone apparatus  
A telephone with an inter communicating facility is disclosed. The telephone has: a condition storage unit for storing operation condition data; an operation process unit for, when the operation of...
4696030 Patient operator intercom arrangements for magnetic resonance imaging systems  
A patient intercom arrangement for magnetic resonance imaging systems wherein the gradient noises are recorded and substracted from the voice plus noise signals received from the patient during...
4636585 Telephone installations  
A telephone installation has two talk-listen stations each comprising a telephone case adapted to receive talking and listening means housed in a common receiver case. At least one switch is...
4588859 Two channel audio communication system  
A two channel intercommunication system has a high degree of noise immunity. The gain of each channel is controlled by a gain control loop processing circuit. The signal condition in one channel...
4503532 Multipoint fiber optic junction terminal  
In an intercom system, electrical noise interference is alleviated by interconnecting the tranceivers and receivers with the control sets via fibre optic lines. Audio signals are applied to a...
4396800 Microphone switching device  
Apparatus allowing a performer on stage using a microphone to communicate privately backstage during a performance with minimum or unobservable interruption to the audience. A miniature switch on...
4392243 Transceiver having interphone system  
A transceiver having an interphone system which is comprised of two transmitter and receiver units, a transceiver, an interphone and switching means for selectively connecting the transmitting and...
4313033 Apparatus and method for digital combination of delta modulated data  
Apparatus and method for processing sound as delta modulated digital data bits. A speaker console communicates with a listener console through a central switching unit. Tri-state generators within...
4123620 Apparatus for controlling the sound generation in the loudspeakers of intercommunicating telephone sets in response to speech signals from the microphones of said telephone sets  
An apparatus for controlling the generation of sound in the loudspeakers of intercommunicating telephone sets in response to pulse-code modulated speech signals from the microphones of the...
4075426 Parallel silent communicator  
A parallel silent communication system comprises a secretary or phone operator console and an executive console. The executive console has a screen for visual display (discretely visible only to...
4057688 Intercom embodying tap transducers  
An intercom system having a pair of interconnected devices, each of which has a speaker, a tap transducer, a power source and switch means, so that when they are connected together electrically,...
4051325 Speech intercommunication system  
In an intercommunication system comprising transmit and receive channels including respective variolossers and being connectable through a hybrid transformer to an external line, the variolossers...
4049911 Talk-through unit with voice controlled switching with turn off delay variable from 250-500 milliseconds depending on voice amplitude  
There is disclosed a compact battery-powered, self-contained talk-through unit for passing voice communications through a partition. Typically, the unit is installed in a window partition...
4001506 Home intercom telephone set  
The present invention concerns a toy telephone or home intercom in which the electrical parts and connections are prefabricated into a self-contained unit which can be detachably mounted in a...
3999015 Aircraft multi-communications system  
An aircraft communication system adapted to provide a plurality of communication paths from respective inputs to a plurality of outputs, the communication paths being flexible in arrangement and...
3997733 Intrinsically safe communication systems  
The invention is a communications and tone control system for use between safe and hazardous areas. The invention's field terminals operate in hazardous areas and are limited to low, intrinsically...
3924073 Home intercom telephone set  
The present invention concerns a toy telephone or home intercom in which the electrical parts and connections are prefabricated into a self-contained unit which can be detachably mounted in a...
3889068 Camp-on circuitry  
This specification discloses electronic camp-on control circuitry for use in a common control switching system serving as a private branch exchange. The system utilizes a crossbar switch network...
3872440 HOSPITAL COMMUNICATION SYSTEM  
Signals are transmitted in a hospital communication system between sub-units of room units and a central nurses station over a common high frequency line, each room unit having an identifying high...
3864527 INTERCOMMUNICATION SYSTEM USING CONTROLLED GATES  
A three port controlled gate and an intercommunication system incorporating the gate are disclosed. The gate is so formed that the control signals for opening the gate can be applied to the same...
Matches 1 - 50 out of 89 1 2 >