G
LOSSARY
96
characters per second (CPS)
A data transfer rate generally estimated from
the bit rate and the character length. For
example, at 2400 bps, 8-bit characters with
start/stop bits (for a total of ten bits per
character) will be transmitted at a rate of
approximately 240 characters per second
(cps). Some protocols, such as error-control
protocols, employ advanced techniques such
as longer transmission frames and data
compression to increase cps.
class 1 and 2.0
International standards used between fax
application programs and faxmodems for
sending and receiving faxes.
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
Communications between computers utilizing
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 the
throughput.
