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Topic: Coupler

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	Modem - Wikipedia, the free encyclopedia
		Since the modem could not dial the phone, the acoustic coupler remained common because you needed to dial the phone separately anyway.
		Modems generally remained at 300 and 1200 bps into the mid-1980s, although over this period the acoustic coupler disappeared seemingly overnight as Smartmodem-compatible modems flooded into the market.
		A 2400 bps system similar in concept to the 1200 bps Bell 212 signalling was introduced in the US, and a slightly different, and incompatible, one in Europe.
	en.wikipedia.org /wiki/Modem (5536 words)

	Acoustic coupler: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-09)
		In telecommunications and electronics, baud (pronounced) is a measure of the "signaling rate" which is the number of changes to the transmission media per...
		Acoustic couplers were sensitive to external noise and depended on the widespread standardisation of the dimensions of telephone handsets.
		Acoustic couplers are still used by people travelling in areas of the world where electrical connection to the telephone network is illegal or impractical.
	www.absoluteastronomy.com /encyclopedia/a/ac/acoustic_coupler.htm (1156 words)

	The Henna Page - How
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	hennapage.com /henna/how/index.html (305 words)

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