MT5634HD8 User Guide
82
CommPlete Communications Server
Pulse-width
: Pertaining to a digital signal.
Pulse width refers to the duration of one state
between clocking signals. Pulse width roughly
corresponds to an analog signal’s wavelength.
Q
QAM (Quadrature Amplitude Modulation)
:
A complex method of modulation that
establishes twelve phase angles and four
amplitudes, designating sixteen possible
combinations. QAM encodes hexadecimal
values (also called quadbits) into one cycle of
the carrier. Using a 1800 bps carrier frequency
and a 2400 baud signaling rate, QAM provides a
9600 bps modulation speed. However, because it
uses amplitude modulation, QAM is susceptible
to noise.
Queue
: A set of activities that are waiting in
chronological order for an action, such as
printing, to be performed.
R
Rack
: A frame or cabinet into which components
are mounted. The industry standard rack is 19”
wide and has variable depth and height.
Rackmount
: A packaging style available for
many types of electronic equipment which
enables the installer to mount the equipment in
an industry standardized enclosure. The
rackmount equipment is fitted with brackets,
rather than being packages in its own enclosure.
Rackmounting conserves disk and floor space
(real estate) and often conserves power outlets.
RAM (Random Access Memory)
: A computer’s
primary workspace. All data must be stored in
RAM (even for a short while), before software
can use the processor to manipulate the data.
Before a PC can do anything useful it must move
programs from disk to RAM. When you turn it
off, all information is RAM is lost.
Reboot
: Restarting your PC by turning off the
power and then turning it back on, or by pressing
Alt,Ctrl and Del keys at the same time. Warm
boot=Ctrl+Alt+Del (soft boot) or Cold
boot=Power switch (hard boot).
Repeater
: A device that amplifies or
regenerates the data signal in order to extend
the distance of the transmission. This can be
used with both analog and digital signals, and
is used extensively in long distance transmission
to keep signals from losing their strength.
Resolution
: Indicates the number of dots that
make up an image on a screen or printer. The
more dots, the higher the resolution, and the
finer and smoother the images can appear when
displayed at a given size.
RJ-11
: An industry standard interface used for
connecting a telephone to a modular wall
outlet; comes in 4-and 6-wire packages.
RJ-45
: An 8-wire modular connector for voice
and data circuits.
ROM (Read Only Memory)
: A memory chip
that permanently stores instructions and data.
Its contents are created at the time it is
manufactured and cannot be altered. ROM is
used to store control routines in PCs and
peripheral controllers. ROM is also used in the
plug-in cartridges for printers and video games.
A set of ROM chips contain the basic
input/output system (BIOS).
RS232-C
: An EIA standard for a serial
interface between computers and peripheral
devices (modem, mouse, etc.). It uses a 25-pin
DB-25, or a 9-pin DB-9 connector. The RS232
standard defines the purposes, electrical
characteristics and timing of the signals for
each of the 25 lines.
RTS (Request To Send signal)
: With
communications between modems, an RS232
signal sent from the DTE to the modem
requesting permission to transmit. Contrast
with CTS.
S
Scanner
: A hardware device that can “read” a
photograph or other piece of artwork and
transforms it into a collection of dots that can be
stored as a bit-mapped file on a hard drive. It
can then be manipulated into various software
programs and placed electronically in a page
layout program.
SDLC (Synchronous Data Link Control)
: In
IBM’s SNA networks, this is the primary data
link protocol.
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 ...
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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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