From C to D
A wand, laser scanner, or other device
that scans bar code information. A cabled scanner is connected to
a bar code reader or terminal with a cable rather than being built
into (integrated in) the reader or terminal.
A window located at the front end of
the 7350 optical head, through which the camera views objects on
Charge-coupled device scanner. A CCD
scanner contains no moving parts and uses a light source to illuminate
the entire symbol. A symbol is scanned electronically using the
digitized image of a line through the symbol provided by the linear
1. A place in RAM to deposit transactions
when sending from one process to another process in a multitasking
environment. A waiting place for data (mailbox). 2. The path for
transmitting data from a device to the host. In RF networks, it
is the frequency hopping sequence the card follows. The 2.4 GHz
bandwidth can be divided into 15 different channels.
A method by which a device maintains
its ability to transmit data by searching for an open RF frequency
when its current frequency is unavailable.
1. A single group of bars and spaces
that represent an individual number, letter, punctuation mark, or
other symbol. 2. A graphic shape representing a letter, numeral,
or symbol. 3. A letter, digit, or other symbol that is used as part
of the organization, control, or representation of data.
The vertical or horizontal position
of characters with respect to a given set of reference lines.
In a linear bar code symbol, the number
of data characters per unit length (typically, per inch). For a
discrete symbology, the character width must include the intercharacter
The characters that are available to
be encoded in a particular automatic identification technology.
A character included in a message for
the purpose of performing a mathematical check to ensure the accuracy
of the message.
A character included in a bar code for
the purpose of performing a mathematical check on the value of the
decoded bar code to ensure its accuracy.
A calculated value that is used to test
data integrity. Errors can occur when data is transmitted or when
it is written to disk. One means of detecting such errors is the
use of a checksum. A value is calculated for a given chunk of data
by sequentially combining all the bytes of data with a series of
arithmetic or logical operations. After the data is transmitted
or stored, a new checksum is calculated and compared with the original
one. If the checksums match, the transmission or storage was probably
error free. If they do not match, an error occurred.
Console Interface Program. The software
interface that lets the user interact with the DCM kernel to view
performance statistics or alter the configuration or operation of
the DCM system.
See quiet zone.
The computer from which you will access
drives, directories, files, and programs that are stored on the
server. See also server.
If DCM and the application program software
are installed on physically different computers, the application
programs computer is called the client host. See also server.
A procedure that copies the RAM contents
(configuration, formats, fonts, pages, and graphics) from the memory
of one printer to the memory of another.
Complementary metal-oxide semiconductor.
A type of integrated circuit noted for its extremely low power consumption.
A type of cable used to connect the
controller directly to an IBM host. Coaxial cable consists of an
outer layer of insulation, an outer conductor, another insulating
layer, and a central conductor. See also twinaxial.
A self-checking, discrete bar code symbology
that has these 16 characters in its set: 0 to 9, dollar sign ($),
colon (:), slash (/), period (.), plus (+), and minus (-). Codabar
is commonly used in libraries, blood banks, and air-parcel express
applications. The American Blood Commission (ABC) Codabar requires
that you retain the start/stop code digits when processing a Codabar
symbol. The maximum density for a Codabar symbol is 12.8 characters
See bar code.
A high density, discrete, numeric bar
code developed by Intermec. The character set includes the numbers
0 through 9 and the dash character (-). Each character is represented
by a standalone group of three bars with two included spaces. This
code is not self-checking. One or two check digits provide data
security. Code 11 is widely used in labeling telecommunications
equipment. Its maximum density is 15 characters per inch.
A variable length, continuous, and weakly
self-checking bar code developed by Computer Identics. It requires
loose printing tolerances. It supports the extended ASCII character
set. Its high density makes it useful when printing data in a limited
space. The character set includes all 128 ASCII characters. Each
character is represented by 11 modules and four bar widths. Its
maximum density is 12.1 alphanumeric characters per inch or 24.2
numeric characters per inch.
A two-dimensional (stacked rows) ultra-high
density bar code that has loose printing tolerances. Code 16K is
based on Code 128 (128 squared is 16,384 or 16K). It requires a
check digit. Code 16K is widely used in labeling unit-dose packaging
for the health care industry; it is suitable for labeling small
objects because it can encode more data in less area than many other
codes. The character set includes all 128 ASCII characters.
Code 2 of 5 (2 of 5)
A discrete, self-checking code for encoding
numeric data only. The bars encode information and the spaces separate
individual bars. It can achieve densities of 15 characters per inch.
An alphanumeric bar code symbology that
is discrete, variable length, and self-checking. It requires loose
printing tolerances. It is used in manufacturing, government agencies,
and health care. The character set is A - Z uppercase, 0 - 9, dollar
sign ($), period (.), slash (/), percent (%), space ( ), plus, (+),
and minus (-). It can be extended to full 128 character ASCII by
use of a two-character encoding scheme (see full ASCII). Its maximum
density is 9.8 characters per inch.
A bar code symbology that is multirow,
fixed length, and continuous. It requires loose printing tolerances.
It is suitable for labeling small objects because it can encode
more data in less area than other codes. The character set is all
128 ASCII characters. Its maximum density is 93.3 alphanumeric characters
per inch or 154.3 numeric characters per inch.
A bar code symbology that is discrete,
variable length, and self-checking. It requires loose printing tolerances.
It can be used interchangeably with Code 39 when higher density
printing is required. The character set is the same as Code 39:
A - Z uppercase, 0 - 9, dollar sign ($), period (.), slash (/),
percent (%), space ( ), plus, (+), and minus (-). It can be extended
to full 128 character ASCII by use of a four-character encoding
scheme (see full ASCII). Its maximum density is 14.8 characters
A 2D matrix symbology that is especially
useful for applications such as small parts labels that do not provide
sufficient space for linear bar codes. In addition to data storage
and error correction symbols, each Code One symbol contains a set
of horizontal lines in the center, called a finder pattern, that
helps readers quickly locate and identify each symbol. Code One
symbols also contain vertical reference bars to help readers locate
the relative positions of each data bit.
One of two ways to boot the reader;
compare to warm boot. A cold boot invokes the BIOS boot sequence,
which verifies that the 256K flash system image is not corrupt,
clears all memory, and performs a complete power-on self test (POST)
to ensure that the hardware and peripherals are operational. The
cold boot initializes the system hardware for use by system software,
loads the default configuration, runs AUTOEXEC.BAT and CONFIG.SYS,
and loads DOS. Because the physical RAM drive is initialized, all
files on drive E are lost. You may cold boot the reader to clear
the reader's conventional memory, break out of an application that
is locked in an infinite loop, or recover from an error condition.
Commonly used short form of communications
port. COM ports offer serial communications, which means that data
is transmitted one bit at a time over a single line from one computer
An application on the reader that lets
you transmit and receive files, and see the status of the reader's
COM port. This application is available on the Application companion
A set of rules or standards designed
to enable computers to connect with each other and exchange data.
An example of a communications protocol is Point-to-Point protocol.
Transmit and receive functions that
you can call with PSK functions or software interrupts. Included
in the Reader Services programs.
Compound Function key
The Compound Function key is a special
key on the JANUS keypad. You use the f key to access characters
or perform functions that do not have an actual key on the keypad.
When you press fw, the key is held in a buffer and the Compound
Function key icon appears on the reader's display. Once you press
a key other than fw, the key combination is entered into the reader
and the icon disappears from the display.
A subset of Codabar symbology. Two bar
code labels are read as one where the stop code of the first label
matches the start code of the second label.
The operation of joining two or more
character strings together, end to end.
The selected parameters that determine
the operating characteristics of an electronic device.
A configuration command changes the
way the terminal or reader operates. You can enter a configuration
command by typing on the keypad, by scanning a bar code label, or
by sending a command from a device on the network.
A configuration file is an ASCII text
file that contains settings for some or all of the reader's configuration
A Reader Services program on the reader
that maintains the reader's current configuration file, ensures
that the reader operates according to that configuration, and lets
you change the configuration file.
Mode used to select the parameters of
the reader. One of two modes available in the reader.
Configuration and control manager. The
software interface that enables the user to interact with the DCM
message handler to view performance statistics or alter the configuration
or operation of the DCM system.
A terminal or monitor used to configure
the 9180 controller and to supervise the RF data collection system.
A scanner that requires physical contact
between the code medium and the scanner.
A bar code or symbol in which the space
between two characters (intercharacter gap) is part of the code,
such as USD-1 (Interleaved 2 of 5 Code). A continuous code is the
opposite of a discrete code.
Amount of difference in reflectance
between the dark bars and the light spaces of a bar code; measured
by print contrast signal (PCS).
A reader mode you use to temporarily
change some of the display parameters at the DOS prompt or when
running an application. The parameters are reset when you boot the
A panel on the printer containing the
operating and menu keys, liquid crystal display, and indicator lights.
An electronic device that interfaces
between the data collection devices and the host.
The reader has 1MB of battery-backed
dynamic RAM. The first 640K is conventional memory and is virtually
the same as that of a PC. You can use this memory to run applications.
Cyclic redundancy check. The CRC is
a data block check used to enhance data integrity. A CRC calculation
is performed on the contents of each received RF message. If the
result of this calculation compares with the received CRC, then
the message was received without error.
Intermec proprietary data collection
network consisting of a 9161 port concentrator or a 9154 controller,
data collection devices, printers, and input devices.
Computer response required mode. An
operating parameter that, when enabled, requires the reader to await
a response from the host before sending more data. The response
from the host is transmitted using the selected protocol.
Carrier sense multiple access/collision
avoidance. CSMA/CA is a protocol that allows each node to sense
whether or not a channel is in use before attempting to transmit
information. CA is an algorithm by which channel time is reserved
to avoid collisions.
Carrier sense multiple access/collision
detection. CSMA/CD is a protocol that allows each node to sense
whether or not a channel is in use before attempting to transmit
information. If it detects no other carrier, it transmits. If a
collision is detected, the device stops transmitting, waits a random
length of time, and begins transmitting again.
Clear to send. Used in communications
protocol to verify a ready state.
Clear to send/ready to send. A type
of hardware flow control. The reader or terminal signals the serial
port device when ready to receive data (CTS). The reader or device
checks with the serial port device when ready to send data (RTS).
The current screen in screen mapping
refers to the host screen you are currently defining. You must select
a current screen before you can define host screen fields, regions,
The current transaction in screen mapping
refers to the transaction for which you are currently defining script.
The current transaction may send data to different host screens.
You must select a current transaction before you can define host
screens, host screen fields, regions, and messages.
A set of keys on the reader that allows
you to move the cursor around the screen.
An optional device for the printer that
cuts individual labels and drops them into a tray.
The number of bits used for data. Generally
set at seven or eight. Used in communication protocol. Set according
to the host configuration.
A sequence of continuous data character
or bytes transmitted as a unit.
data collection device
A device in the data collection system
that collects data from bar codes and sends it to the host.
Data Entry mode
The default operating mode for a bar
code reader. The reader waits to receive data or commands from a
label, keypad, or host.
The collection of data and printer commands that, when sent to the
printer, is merged with a format file to print a label.
data line print
A mode of operation in which the printer prints each command (accompanied
by its ASCII code) that it receives from the host.
An event in which a block of data is transmitted from one device
A communications event where data is transmitted from one device
Data communication equipment that provides the communication connection
function in a computer environment (such as a modem).
Data Collection Manager. An Intermec connectivity product that lets
you set up communications between runtime applications and the data
input stations. A variety of communication protocols are supported,
including TCP/IP, APPC, and screen mapping.
Part of a bar code reading system, it is the electronic package
that receives the signal from the scanner, performs the algorithm
to translate the signal into meaningful data, and provides the interface
to other devices.
The values set for each configuration parameter when the device
A set of configuration parameters that are active when the device
The IP address of a router that is used when a device sends a packet
to another subnet or when a device sends a packet to an unknown
The amount of information encoded in a given area. See also bar
depth of field
The distance between a minimum and maximum plane in which a reader
can read symbols of a specific dimension.
Either the logical name of a device or the name of an application
program's channel. Anyplace where a transaction can be sent.
Device communication process. Provides communications between a
host and a particular device (readers, printers, controllers, concentrators).
There is a DevComm for each attached device per port. In a given
installation, there will be one port for each device required, each
running a copy of a device DevComm. One module is created (spawned)
for each communications port when DCM is initialized.
Generic term for any piece of equipment, such as a terminal, a reader,
a printer, or a controller.
A type of address that is used by the host to identify a particular
data collection device. This address can also refer to the device's
A software component that controls an external device. For example,
a PC card device driver controls how the reader accesses the PC
Data Flow Manager. The Intermec software product that routes the
information from source to destination.
The component of light that reflects in all directions from the
Pertaining to data in the form of digits. In signals, digital refers
to a signal that assumes one of a predetermined set of values, such
as 0 to 1, as opposed to a signal that may assume any value over
a continuing range of values, such as an analog signal.
A spread spectrum technique by which the transmitted signal is spread
over a particular frequency range.
A method of thermal printing in which images are printed when heat
from the thermal printhead produces a black mark on the media.
A device that is hard-wired to a port of the host.
The presence of relatively nonreflective foreign particles embedded
in a sheet of paper. The size and lack of reflectance of the particles
may be such that they will be mistaken for inked areas by an optical
A bar code symbol in which the intercharacter gap is not part of
the code, and is allowed to vary dimensionally within wide tolerance
limits. It is the opposite of continuous code.
Two-line screen on the control panel that displays messages such
as printer status, menus, commands, and errors.
ASCII Data Link Exception character. It causes the character that
follows it to be received as data, even if it is a protocol character.
It allows for the use of control characters in preambles, data strings,
and configuration command strings.
Dynamic link library. A subroutine package that is bound to an application
at load time or during execution, rather than at link time when
the program is created.
The area within a LAN that defines a region administered by a controller
or server. The domain is also called a subnetwork.
DOS code pages
A code page is a table that relates binary character codes used
by a program to keys on the keypad or to characters on the display.
All international keypads are translated using an installed DOS
code page that contains the standard ASCII character set and a set
of national language characters specific to the language the code
1. A device that is at the terminal end of a connection to the computer
is referred to as being downline. When devices are connected to
a computer, they are connected in a line. Downline is a direction
relative to the computer. See also upline. 2. If more than one computer
is connected in a line, the upline computers usually handle data
processing and the downline computers usually handle data collection
and sometimes some data preprocessing.
Abbreviation for dynamic random access memory. A type of RAM that
stores information in integrated circuits containing capacitors.
Since capacitors lose their charge over time, DRAM boards include
logic to recharge, or "refresh," the RAM chips continuously.
Since their internal circuitry is simple, DRAMs are more commonly
used than static RAMs, even though they are slower. DRAM can hold
approximately four times as much data as a static RAM chip of the
same complexity. The reader has 1MB of battery-backed DRAM.
An electromechanical device that reads from and writes to disks.
The three types of common disk drives are floppy disk drives, hard
disk drives, and PC card drives.
1. A software module that controls an input/output port or external
device. 2. Software or firmware that translates operating system
requests (such as input/output requests) into a format that is recognizable
by specific hardware, such as adapters.
Data transmission equipment. A computer or terminal that provides
data in the form of digital signals at its output.