Networking Explained, 2nd Edition

626 Networking Explained, Second Edition

V.32 ITU-T standard for 9600-bps modems; cycles to 4800 bps when line quality degrades,

and cycles forward when line quality improves.

V.32 bis ITU-T standard that extends V.32 to 7200, 12,000, and 14,400 bps; cycles to lower

rate when line quality degrades and cycles forward when line quality improves.

V.32 ter Pseudostandard that extends V.32 bis to 19,200 bps and 21,600 bps.

V.34 ITU-T standard for 28,800 bps modems. (Note: V.34 modems upgraded with special

software can achieve data rates of 31,200 bps or 33,600 bps.)

V.FAST Proprietary pseudostandard from Hayes and Rockwell for modems transmitting at