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→Evolution of dial-up speeds: v.27 ter 1976 |
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Commodore's 1982 ''VicModem'' for the [[VIC-20]] was the first modem to be sold under $100, and the first modem to sell a million units.<ref>{{Cite journal |last=Herzog |first=Marty |date=January 1988 |title=Neil Harris |journal=Fictioneer Books. |volume=Comics Interview |issue= 54 |pages=41–51}}</ref>
In 1984, [[ITU-T V.22bis|V.22bis]] was created, a 2,400-bit/s system similar in concept to the 1,200-bit/s Bell 212. This bit rate
Increasing modem speed greatly improved the responsiveness of online systems and made [[file transfer]] practical. This led to rapid growth of [[online service]]s with large file libraries, which in turn gave more reason to own a modem. The rapid update of modems led to a similar rapid increase in BBS use.
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| 2,400 bit/s (1200 baud) ([[ITU-T V.26bis|V.26bis]]) || PSK || 2.4 ||
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| 4,800 bit/s (1600 baud) ([[ITU-T V.27ter|V.27ter]]) || PSK || 4.8 || 1976<!--Phase=PSK?--><ref>{{cite web |url=http://www.garretwilson.com/essays/computers/group3fax.html |title=Group 3 Facsimile Communication |publisher=garretwilson.com |date=2013-09-20 |access-date=2014-02-10 |url-status=live |archive-url=https://web.archive.org/web/20140203210353/http://www.garretwilson.com/essays/computers/group3fax.html |archive-date=2014-02-03 }}</ref><ref>{{cite book|title=INTERNATIONAL TELECOMMUNICATION UNION - CCITT - VOLUME VIII - FASCICLE Vlll/I - DATA COMMUNICATION OVER THE TELEPHONE NETWORK - RECOMMENDATIONS OF THE V SERIES|url=https://search.itu.int/history/HistoryDigitalCollectionDocLibrary/4.258.43.en.1025.pdf|section=Recommendation V.27 ter|section-url=https://search.itu.int/history/HistoryDigitalCollectionDocLibrary/4.258.43.en.1025.pdf#page=157|series=YELLOW BOOK|pages=148-160|publisher=[[International Telecommunication Union]] - [[ITU-T|International Telegraph and Telephone Consultative Committee (CCITT]])}}</ref>
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| 4,800 bit/s (1600 baud, Bell 208B) || DPSK || 4.8 ||
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