User manual

GLOSSARY
7-2
character
A representation, coded in binary digits, of a letter, number, or other
symbol.
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 by 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
The transmission or sharing of data between computers via 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.
data mode
Mode used by a modem when sending and receiving data files.
DCE
Data Communications (or Circuit-Terminating) Equipment, such as dial-
up modems that establish and control the data link via the telephone
network.