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Quick summary of modem speeds by standard.




From V.xx:

  • V.22 = 1200 bps (at 600 baud (state changes per second))
  • V.22bis = 2400 bps
  • V.32 = 9600 bps
  • V.32bis = 14.4 kbps
  • V.32terbo = 19.2 kbps
  • V.34 = 28.8 kbps
  • V.34bis = 33.6 kbps
  • V.35 "The trunk interface between a network access device and a packet network at data rates greater than 19.2 Kbps. V.35 may use the bandwidths of several telephone circuits as a group."
  • V.42 "Same transfer rate as V.32, V.32bis, and other standards but with better error correction and therefore more reliable"
  • V.90 = 56 kbps (but less in practice due to analog/digital "problems" and because the FCC limits the max to something like 53.6 kbps) — "Derived from the x2 technology of 3Com (US Robotics) and Rockwell's K56flex"
  • V.92 = same as V.90 with call waiting??


  • () RandyKramer - 02 Apr 2003
  • <If you edit this page: add your name here; move this to the next line; and include your comment marker (initials), if you have created one, in parenthesis before your WikiName.>

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Topic revision: r1 - 2003-04-02 - RandyKramer
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