Omni 56K USB Lite
F
Glossary
zero. The smallest unit of computerized data.
Bit Rate
Count of data bits transmitted per time unit. The framing bits needed for
asynchronous transfer are also counted in the calculation of the bit rate. In
general, the bit rate is ten times the character rate.
bps
Unit of measurement. Bits per second.
Byte
A set of bits that represent a single character. There are 8 bits in a Byte.
Carrier
The carrier is a modulated tone and is used by the modem to transfer the data.
CCITT
Comité Consultatif International Thonique et Traphique; former name for the
ITU-TSS (ITU-T), the international standard making organization for
telecommunications.
CD
See DCD.
CDR
Call Detail Record. This is a name used by telephone companies for call-related
information.
Cipher Text
Text that has been scrambled or encrypted so that it cannot be read without
deciphering it. See Encryption.
Class 2
A standard for fax transfers using a fax modem. Currently several drafts exist
which are incompatible with each other. ZyXEL modems support the draft PN-
2388 of August 20th 1990 and the final 2.0 standard.
Client
A software program that is used to contact and obtain data from a Server
software program on another computer. Each Client program is designed to
work with one or more specific kinds of Server programs, and each Server
requires a specific kind of Client. A Web Browser is a specific kind of Client.
CNG
Call negotiation tone. A calling fax machine sends this tone before connecting
to quickly establish a fax connection. A data modem may also have a data
calling tone.
CO
(Central Office): a facility that serves local telephone subscribers. In the CO,
subscribers' lines are joined to switching equipment that allows them to connect
to each other for both local and long distance calls.
COM Port
Another name for the serial port on a PC.
Command
Mode
In command mode, a modem accepts commands from the local DTE. Data
transfer is suspended while the modem is in command mode.
