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What is DECT? - We explain the telephone standard

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What is a DECT phone and how does it work?
What properties does DECT bring with it?
What about the radiation from DECT?

In our tips + tricks you can find out what DECT means and what the standard enables for cordless telephones..

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DECT stands for "Digital Enhanced Cordless Telecommunications" and represents an international digital standard for wireless telecommunications. DECT telephones are becoming increasingly common, especially in private households. In the following article you can find out what DECT telephones actually are, what convenience the standard brings and more.

What is a DECT phone and how does it work?

DECT is the current standard for cordless voice and data communication. A DECT telephone uses frequency ranges below 2.45 GHz and is therefore immune to higher frequencies such as WLAN or Bluetooth. The operating license for other cordless telephones has expired since 2009 because their frequency bands were assigned elsewhere. This means that since then DECT technology has been the only radio transmission standard used in Germany for the use of radio telephones. Earlier predecessors of the wireless standard for cordless telephones are CT1 + and CT2. In contrast to smartphones, DECT telephones are limited in their range and must always be connected to a base station in order to function.

A DECT system therefore always consists of two components that are in constant communication with one another. On the one hand there is the cordless telephone itself, which is also called a mobile part , and on the other hand a base station, also called a fixed part . The DECT base station forms the bridge between the telephone and Internet connection and the handset. This can either be the base station supplied by the manufacturer or your router, provided it supports the DECT function..

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You can often see whether your router supports DECT by its labeling and the lamps. As soon as a telephone is connected, the DECT lamp would also light up green here.

If you are outside of a certain radius of the base station, the signal may drop out. Inside buildings, the range is up to 50 meters and outdoors even up to 300 meters . A DECT telephone, which is a cordless, stationary telephone, can be connected to one or more base stations. The DECT base station charges the battery and can also be connected to the router so that calls can be received throughout the household. In addition, an answering machine is often integrated there. In short, DECT is to landline telephones what WLAN is to the Internet.

Tip: You can read here how to connect a DECT telephone to your FritzBox..

What properties does DECT bring with it?

  • Solid range (inside up to 50 meters, outside up to 300 meters)
  • Improved sound quality compared to older standards
  • Energy saving
  • Frequency range independent of the WLAN
  • secure against eavesdropping attempts

What about the radiation from DECT?

Like other radio standards, DECT systems also emit electromagnetic radiation to the environment and also to people. The base station sends a signal continuously, while the handset only sends a signal when there is an active call. However, the specific absorption rate (SAR) of a DECT device is below the maximum intended load of 2 W / kg. On average, DECT devices have a value of 0.05-0.1 W / kg . The continuous radiation of the DECT systems has been a discussed topic for years, which has also been criticized by the Federal Office for Radiation Protection (BfS). The manufacturers then received requirements to reduce the radiation. This has resulted in labels such as ECO mode or also ECO + established, which are intended to further reduce radiation in standby mode. Compared to smartphones, the maximum permitted limit values ​​for radiation from DECT telephones are higher, but most of the current DECT devices have lower radiation values .


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