3Com 56k User's Manual And Reference page 39

cyclic redundancy checking (CRC)
An error-detection technique consisting of a test
performed on each block, or frame, of data by both
sending and receiving modems. The sending
modem inserts the results of its tests in each data
block in the form of a CRC code. The receiving
modem compares its results with the received CRC
code and responds with either a positive or
negative acknowledgment.
data communications
A type of communications in which computers are
able to exchange data over an electronic medium.
data compression table
A table containing values assigned for each
character during a call under MNP5 data
compression. Default values in the table are
continually altered and built during each call: The
longer the table, the more efficient throughput
gained.
Glossary
data mode
The mode in which the faxmodem is capable of
sending and receiving data files. A standard
modem without fax capabilities is always in data
mode.
DCE
Data Communications Equipment (or Circuit-
Terminating Equipment) is equipment such as
dial-up modems that establish and control the data
link via the telephone network.
default
Any setting assumed, at startup or reset, by the
computer's software and attached devices. The
computer or software will use these settings until
changed by the user or other software.
detect phase
In the ITU-T V.42 error-control protocol, the first
stage in establishing if both modems attempting to
connect have V.42 capability.
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