Key Telephone System

What Does Key Telephone System Mean?

In enterprise IT, a key telephone system (KTS) is a telecommunications system that converts a single public switched telephone network (PSTN) line into an array of internal business lines. This basic phone system allows users to use various internal lines from a single telephone desktop set.


Techopedia Explains Key Telephone System

The KTS is often compared to the private branch exchange (PBX) system, which is more complex and sophisticated. In a PBX system, phone trunking allows for one central line to be split into various business lines within a building. Moreover, a PBX system can function as a switch, whereas a KTS cannot; the latter is most often used by companies that do not need a lot of multiline functionalities and features in their internal telephone systems. For example, telecommunications experts may recommend less than 30 users for a company’s KTS solution. A KTS can be used with a telephone handset display to provide additional functionalities and features, such as call waiting or caller ID, for the workplace.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…