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Old style cordless telephony

Cordless telephony isn't only from this day and age. It has existed for many years, in all shapes and sizes. Most of them were specially designed and therefore expensive. With the advances in integrated circuitry and the uprise of low cost consumer electronics a range of inexpensive cordless telephones emerged. Since the used frequencies, emitted power etc. were not covered by government regulations these systems were illegal. But because of there quick widespread introduction and usually low interference with other users of these bands, these systems were tolerated. Even though no standard exists for these systems (systems from different manufacturers are usually not-compatible), they are usually referred to as CT0.

To resolve the absence of a clear standard for cordless telephony CEPT (later ETSI) created a standard for analog cordless telephony in the UHF band. This standard was published in the early eighties as CT1.

Because features like speech quality and security became more and more important along with advances in digital technology called for a standard for digital cordless telephony. Several proposals came to live during the eighties, which resulted in CT2 and CT3. Because these two proposals made widespread introduction impossible neither lived to see a big market.

In the late eighties CEPT undertook the task to come up with an European solution to this situation. This resulted in the acceptance of DECT in the early nineties.


Written by my own two hands and an ASCII editor. Problems? write me Last updated July 15, 1999 DECT home

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