User`s manual

U.S. Robotics I-modem Command Reference
Glossary • Page G-48
V.120
An asynchronous rate-adaption protocol for the B-channel. V.120 is a frame-oriented
protocol based on LAPD, and it employs statistical multiplexing techniques to Þll the
64-Kbps channel. Multiple data streams can be mapped to one 64-Kbps channel using
V.120.
V.Fast Class (V.FC)
A proprietary modulation scheme developed by Rockwell International for data communi-
cation speeds up to 28.8 Kbps.
W
word length
The number of bits in a data character without parity, start or stop bits.