ZyXEL Elite 2864 User Guide - Page 237

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GLOSSARY Analog: Not digital. Analog quantities may have any value. Analog loopback test: Testing method in which the modem's analog output signal is connected to the analog input. Answer: In a connection between two modems, one modem works as the recipient (in answer mode) and the second modem as the initiator (originate mode). AppleTalk: A simple network to connect several computers directly with each other. AppleTalk is also the protocol according to which connected computers exchange data. In Apple Macintoshs, this network protocol is part of the system software. ARQ: Automatic Retransmission reQuest - Standardized method in error control protocols. ASCII: American Standard Code for Information Interchange. This code assigns a 7-bit numerical value to characters, digits and control characters. An ASCII character is a 7-bit character with a decimal value ranging from 0 to 127. Asynchronous: Data transfer method in which a character's data bits are framed by additional bits (start bit, parity bit and stop bit). There are variable idle times between characters. AT command: The commands used with an intelligent modem. Every command line is started with the AT prefix (ATtention). To send an AT command to a modem, you must have communications software running. Auto-answer: Modem's ability to automatically answer a call after a set number of rings. Backup dial: ZyXEL modems can establish a backup dial-up connection when a leased-line connection is disrupted and cannot be reestablished. Baudrate: Unit of the symbol speed. Baudot was a French engineer who developed the Baudot code - the precursor of today's ASCII code. BBS: Bulletin Board System, or Mailbox. Computer software which can send and receive messages and files via a modem automatically and which can interact with a remote user. This program usually runs unattended on a computer specifically reserved for this task. bis: Old French word for two. Bit: Smallest unit of information. A bit can have one of two states: ON (1; set) and OFF (0; not set). By combining a number of bits, a computer can code any information. A byte consists of 8 bits. Therefore a byte can have any one of 28 (256) states. Glossary-1

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Glossary-1
GLOSSARY
Analog:
Not digital. Analog quantities may have any value.
Analog loopback test:
Testing method in which the modem's analog output signal
is connected to the analog input.
Answer:
In a connection between two modems, one modem works as the recipient
(in answer mode) and the second modem as the initiator (originate mode).
AppleTalk:
A simple network to connect several computers directly with each other.
AppleTalk is also the protocol according to which connected computers exchange
data. In Apple Macintoshs, this network protocol is part of the system software.
ARQ:
Automatic Retransmission reQuest – Standardized method in error control proto-
cols.
ASCII:
American Standard Code for Information Interchange. This code assigns a
7-bit numerical value to characters, digits and control characters. An ASCII charac-
ter is a 7-bit character with a decimal value ranging from 0 to 127.
Asynchronous:
Data transfer method in which a character's data bits are framed by
additional bits (start bit, parity bit and stop bit). There are variable idle times be-
tween characters.
AT command:
The commands used with an intelligent modem. Every command
line is started with the AT prefix (ATtention). To send an AT command to a mo-
dem, you must have communications software running.
Auto-answer:
Modem's ability to automatically answer a call after a set number of rings.
Backup dial:
ZyXEL modems can establish a backup dial-up connection when a
leased-line connection is disrupted and cannot be reestablished.
Baudrate:
Unit of the symbol speed. Baudot was a French engineer who developed
the Baudot code - the precursor of today's ASCII code.
BBS:
Bulletin Board System, or Mailbox. Computer software which can send and receive
messages and files via a modem automatically and which can interact with a remote user.
This program usually runs unattended on a computer specifically reserved for this task.
bis:
Old French word for two.
Bit:
Smallest unit of information. A bit can have one of two states: ON (1; set) and OFF
(0; not set). By combining a number of bits, a computer can code any information. A
byte consists of 8 bits. Therefore a byte can have any one of 2
8
(256) states.