MT5634HD8 User Guide
72
CommPlete Communications Server
A
AC (Alternating Current)
: A power source
whose signal crosses a reference voltage
(usually called ground or zero). Alternating
between a maximum and minimum voltage, AC
may also be referred to as a bi-polar signal.
Contrast with DC.
ACK (ACKnowledgment code – pronounced
“ack”)
: A communications code sent from a
receiving modem to a transmitting modem to
indicate that it is ready to accept data. It is
also used to acknowledge the error-free receipt
of transmitted data. Contract with NAK.
ACS (Asynchronous Communications
Server):
A communications server that
managers a pool of modems for shared use over
the LAN. It directs outgoing messages to the
next available modem and directs incoming
messages to the appropriate workstation. It
also provides conversion between LAN packets
and asynchronous format.
Address
: A numbered location inside a
computer. It’s how the computer addresses its
resources, like a video card, serial ports,
memory, etc.
Algorithm
: A set of ordered steps for solving a
problem. This can be a mathematical formula
or the instruction in a computer program.
Alphanumeric
: The basic character set which
includes the letters A to Z (and a to z) and the
digits 0 to 9.
Amplitude
: The difference between the
maximum and minimum voltages of a waveform
expressed as a “peak-to-peak” voltage.
Amplifier
: An active device within a circuit
which increases the voltage level of all signals
(desirable and undesirable).
Analog loopback
: A modem diagnostic used to
test either the local analog loop (the modem’s
internal circuitry) or the remote analog loop
(the telephone line). The local analog loop test
is accomplished by activating the self-test
mode and tying the modem’s modulator to its
demodulator and examining the return stream
of data at the PC or terminal it services. The
remote analog loopback can only be activated
on four-wire leased line connections with a
remote modem capable of performing the same
test.
Analog signal
: A waveform which has
amplitude, frequency and phase, and which
takes on a range of values between its maximum
and minimum points. Analog implies continuous
movement from point A to point B, as opposed to
discrete jumps. For example, sound is
continuously varying air vibrations and is
converted into analogous electric signals to be
carried on a telephone line.
Analog Transmissions
: One of two types of
telecommunications which uses an analog
signal as a carrier of voice, data, video, etc. An
analog signal becomes a carrier when it is
modulated by altering its phase, amplitude
and frequency to correspond with the source
signal. Compare with digital transmission.
ANSI (American National Standards
Institute – pronounced “ansy”)
: A U.S.
standards organization supported by over 1000
companies and trade organizations. It is a non-
profit, non-government group that is the U.S.
member of the ISO (International Standards
Organization).
ANSI character set
: An 8-bit character set that
contains 256 characters. The first 128 characters
are alphanumeric and the second 128 contain
math and foreign language symbols.
API (Application Programming Interface)
:
The language and message format used by a
program to activate and interact with functions
in another program or in the hardware. A
software module which provides a uniform
interface for otherwise incompatible programs.
ASCII (American Standard Code for
Information Interchange – pronounced
“askey”)
: A binary code for data that is used
in communications and in many computers and
terminals. The code is used to represent
numbers, letters, punctuation and control
characters. The basic ASCII code is a 7-bit
character set, which defines 128 possible
characters. The extended ASCII file provides
255 characters.
Associate
: Establishing that all files with a
given extension are usable by a certain
application.
Summary of Contents for CommPlete MT5634HD8
Page 1: ...MT5634HD8 User Guide Title MTSLOGOK FH5 Creator FreeHand 5 0 CreationDate Fri Aug 23 16 3 ...
Page 7: ...CommPlete Communications Server 1 1 Introduction ...
Page 13: ...CommPlete Communications Server 7 2 Installation ...
Page 18: ......
Page 19: ...CommPlete Communications Server 13 3 AT Commands ...
Page 45: ...CommPlete Communications Server 39 4 S Registers ...
Page 53: ...CommPlete Communications Server 47 5 Warranty Service and Technical Support ...
Page 60: ...MT5634HD8 User Guide 54 CommPlete Communications Server ...
Page 61: ...CommPlete Communications Server 55 Appendices ...
Page 76: ...MT5634HD8 User Guide 70 CommPlete Communications Server ...
Page 77: ...CommPlete Communications Server 71 Glossary ...
Page 92: ...MT5634HD8 User Guide 86 CommPlete Communications Server ...
Page 93: ...CommPlete Communications Server 87 Index ...
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