User`s manual

U.S. Robotics I-modem Command Reference
Glossary • Page G-14
high-speed modems, the receiving modem accepts no more data until a defective block is
received correctly.
D
data B-channel
The I-modem distinguishes between the data B-channel and the analog device B-channel.
All I-modems need a CSV/D B-channel over which to pass V
.120, fax/modem, and,
optionally, V
.110 data.
data communications
A type of communications in which computers and terminals are able to exchange data
over an electronic medium.
data compression
When the transmitting modem detects redundant units of data, it recodes them into shorter
units of fewer bits. The receiving modem then decompresses the redundant data units
before passing them to the receiving computer.