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2. Tellabs - Wikipedia

   en.wikipedia.org/wiki/Tellabs

   In September 1981, Tellabs introduced the industry's first echo canceller, an advance over the original echo suppressors that synthesized an echo and electronically subtracted it. By 1990, Tellabs had grown to 2,000 employees at 25 locations globally and sales of $211 million.

3. Stompers (toy) - Wikipedia

   en.wikipedia.org/wiki/Stompers_(toy)

   Stompers are battery-powered toy cars that use a single AA battery and feature four-wheel drive. They are driven by a single motor that turns both axles. They were the first battery-powered, electric, true 4WD toys. Stompers were created in 1980 by A. Eddy Goldfarb [1] and sold by Schaper Toys.

4. Echo suppression and cancellation - Wikipedia

   en.wikipedia.org/wiki/Echo_suppression_and...

   The performance of an echo canceller is measured in echo return loss enhancement (ERLE), [3] [9] which is the amount of additional signal loss applied by the echo canceller. Most echo cancellers are able to apply 18 to 35 dB ERLE. The total signal loss of the echo (ACOM) is the sum of the ERL and ERLE. [9] [10]

5. AOL Mail

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6. Echo canceller - Wikipedia

   en.wikipedia.org/?title=Echo_canceller&redirect=no

   Language links are at the top of the page across from the title.

7. AOL Mail - AOL Help

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