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Definition of "telecommunication Device for the Deaf" |
Telecommunication Device for the Deaf is this communication system enables written messages to be transmitted and received over telephone lines and displayed on a screen. The ADA requires use of a special symbol to indicate the availability of a TDD unit. / Wavelength-division multiplexing is a method of combining multiple signals on laser beams at various infared wavelengths for transmission along fiber optic media. Each laser is modulated by an independent set of signals. Wavelength-sensitive filters, the IR analog of visible-light color filters, are used at the receiving end. |
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