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.
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Last updated July 15, 1999
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