IN-HOME EVENT INTERCOM AND NOTIFICATIONS

ELECTRONIC DEVICE AND MICROPHONE SIGNAL CORRECTION METHOD THEREOF

COMPUTER-PROGRAMMED TELEPHONE-ENABLED DEVICES FOR PROCESSING AND MANAGING NUMEROUS SIMULTANEOUS VOICE CONVERSATIONS CONDUCTED BY AN INDIVIDUAL OVER A COMPUTER NETWORK AND COMPUTER METHODS OF IMPLEMENTING THEREOF

IN-HOME EVENT INTERCOM AND NOTIFICATIONS

METHOD AND SYSTEM FOR ELIMINATING ECHO IN THE REPRODUCTION OF RADIO SIGNALS TRANSMITTED VIA A RADIO CHANNEL

Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof

COMMUNICATION STATION AND INTERCOM NETWORK

Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof

NETWORK COMMUNICATION SYSTEM

Speech station for intercom network

Camera system and communication method

Device for analyzing a disturbance of a facsimile communication device and non-transitory recording medium storing a computer readable program

Message recording system for broadcast intercoms

Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof

Multiple dwelling house interphone system

Collective housing/building entrance device and entryphone system having that collective housing/building entrance device

Intercom-network station, intercom network, and method

Wireless patient monitoring system and method

Telephone switching apparatus and method, and program

COMPUTER-PROGRAMMED TELEPHONE-ENABLED DEVICES FOR PROCESSING AND MANAGING NUMEROUS SIMULTANEOUS VOICE CONVERSATIONS CONDUCTED BY AN INDIVIDUAL OVER A COMPUTER NETWORK AND COMPUTER METHODS OF IMPLEMENTING THEREOF

Passenger side display via a user portable device

Communication system and communication apparatus

Nurse call system, interface unit, and nurse call connection method

Nurse call system, nurse call conversion unit, nurse call connection method, and program

Hands-free telephony and in-vehicle communication

Dual mode communication device and method for managing voice communication

Multi-line telephone calling

Codec circuit for POTS system

Method and device by telephone entry systems

Headset Adapter and Methods for Communicating Between a Hands-Free Headset and a Landline Telephone

Hands-free telephony and in-vehicle communication

CODEC circuit for POTS system

Telephone with a Receiver Operated Reed Hook Switch

VANDAL PROOF INTERCOM SYSTEM FOR APARTMENT BUILDINGS

Multi-line telephone calling

Speech amplifier-resident mechanism for controllably supplying power to a line circuit

Telephone exchange apparatus, telephone exchange system, method of controlling telephone exchange apparatus, and control method for use in telephone exchange system

Method for establishing virtual intranet over internet based on a digital closed network constructed from a telephone exchange and a key telephone system and the virtual intranet structure using the same

Network device with hybrid-mode transmitter