As far as I can recall, Motorola is the first vendor to produce WLAN in 1990 and the product was named "Altair". The frequency band in use is 18.82 - 18.87 GHz, running with proprietary proctocol. Of course, the price was prohibitively high and such kinds of products with proprietary standard did not gain wide market acceptance.
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I worked on Altair at Motorola. The picture shows the client-side device , which was designed to sit up your desk phone. It costs approximately $2,000. If I remember correctly, the data rate was 56 kbps.
There were several vendors creating competitive products at the time. Motorola was the only WLAN to operate in the 18 GHz band.
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