Business Telephone Systems

Headsets and Cordless Phone

Interconnecting Switches and Equipment

Voice over Internet Protocol (also voice over IP, VoIP or IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.

The terms Internet telephony, broadband telephony, and broadband phone services specifically refer to the provisioning of communications services (voice, faxSMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).

A headset combines a headphone with a microphone.

Headsets are made with either a single-earpiece (mono) or a double-earpiece (mono to both ears or stereo).

Headsets provide the equivalent functionality of a telephone handset but with hands free operation.

They have many uses including in call centers and other telephone-intensive jobs and for anybody wishing to have both hands free during a telephone conversation.


A cordless telephone or portable telephone is a telephone in which the handset is portable and communicates with the body of the phone by radio, instead of being attached by a cord.

The base station is connected to the telephone network through a telephone line as a corded telephone is, and also serves as a charger to charge the handset's batteries.

The range is limited, usually to the same building or some short distance from the base station.

A network switch (also called switching hub, bridging hub) is a computer networking device that connects devices together on a computer network by using packet switching to receive, process, and forward data to the destination device.

Switches for Ethernet are the most common form of network switch.

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