From Q to R
Open applications integration. An OAG term for the process of integrating
A place in RAM to deposit messages when sending from one process
to another process in a multitasking environment. A waiting place
for data (mailbox.)
Area immediately preceding the start character and following the
stop character that contains no markings and is free of any extraneous
marks. It is quiet in terms of the scanning signal produced.
A design that supports systems based on 400 MHz UHF< 900 MHz
spread spectrum, 2.4 GHz OpenAir, IEEE 802.11 Frequency Hopping,
IEEE 802.11 Direct Sequence, and future wireless radio technologies.
Random access memory. Memory that can be written into, or read,
by locating any data address.
A disk drive that exists only in extended memory in your terminal
or reader. You create, read, write, and delete files on a RAM drive
the same way you can on a hard disk drive. RAM drives are faster
than hard disk drives because the contents of a RAM drive are, by
definition, always resident in RAM. The contents are destroyed when
you cold boot the device.
Reverse address resolution protocol server. A device that assigns
a physical address in response to a query from an IP node. In this
query, the IP node supplies its IP address. The RARP server then
checks its tables to determine the corresponding physical address.
An output mode that is selected for RS-232 and RS-422 interfaces.
This mode does not use any flow control during communication.
Ratio of the number of successful reads on the first attempt to
the number of attempts.
An input device that reads bar codes, converting the input data
to electronic data. Typically consists of a scanner, a decoder,
and a data communications interface.
A reader command causes the terminal or reader to perform a task.
You can enter a reader command by typing on the keypad, by scanning
a bar code label, by sending a command from another device on the
network, or by sending a command from the host.
A collection of programs on the reader that decode bar codes, process
data input and output, configure the reader, and handle power management.
A method of communicating between two JANUS readers. By placing
two readers so the receive signal on one reader aligns with the
transmit signal on the other reader, and the transmit signal on
the first reader aligns with the receive signal on the other reader,
you can achieve direct communications between the two readers. For
this type of communications, the readers should be no more than
1 inch apart.
The state in which the printer is able to print; the normal operating
state of the printer.
Pin 11 of the rear panel connector. Indicates the printer is ready
or not ready.
The immediate availability of data to an information system as a
transaction or event occurs.
records per block
The maximum number of data records transmitted per block of data.
A block of data is transmitted during a single transmission event.
When you access the audit file (DCMAUD.DAT,) the data are time-stamped
and processed just as if they were being currently collected.
The ratio of the amount of light of a specified wavelength or series
of wavelengths reflected from a test surface to the amount of light
reflected from a barium oxide or magnesium oxide standard under
similar illumination conditions.
In screen mapping, a particular area on a screen that can be used
to display messages and error conditions. Also referred to as the
In screen mapping, a user-defined string that is sent to the source
of the transaction when the region is not detected.
Refers to a bar code label that takes the form <start code
data stop code>. Regular symbols are transmitted as soon
as scanned. See also multiple-read symbol.
When you add a REM statement (short for REMark) at the beginning
of a command line in a batch file, DOS treats the line as a remark
instead of as a command. Any statement beginning with the characters
REM will be ignored by the command processor. Typically, users will
remark out device drivers in AUTOEXEC.BAT and CONFIG.SYS startup
When DCM and application programs are installed on physically different
computers, one is remote to the other. It is usually the application
program that is referred to as remote.
Also called repeat count. An action whereby a message is received
and then transmitted by a repeater. It is recommended that no more
than two repeat hops are used per message.
The repeater extends coverage of the RFDC system by functioning
as a message store and forward device.
Request for acknowledgment character. Sent by the reader to the
host to request a retransmission of an acknowledgment to a reader
A program that starts up a conversation with a remote partner program.
A send requester then sends data to that partner program. A receive
requester then receives data from that partner program.
Reset character. Sent by the reader to end communication with the
host. The RES character enables or disables the reset event, or
resets the data transmission event to the solicitation event.
Terminates the current data transmission event and resets the communication
event to the solicitation event. To enable the reset event, define
RES to be other than NULL.
In a bar code system, the narrowest element dimension that can be
distinguished or printed by a particular device.
When you turn the terminal or reader on, the terminal or reader
either resumes exactly where it was when you turned it off, or it
boots and restarts your application.
When handshake event is enabled, the retry count is set to three.
The polled device decrements the retry count every time the NEG
is transmitted. The controller decrements its retry count every
time the REQ is transmitted. The reset event occurs when the retry
count equals zero.
The maximum number of times the controller will try to transmit
to a particular device before it changes the device's status to
unreachable. After the retry limit is reached, the controller continue
to transmit to the device, but at a slower rate.
Radio frequency. A frequency at which coherent electromagnetic radiation
of energy is useful for communications purposes.
RF data collection
Radio frequency data collection system in which the individual components
communicate with each other by radio signals. Abbreviated as RFDC
Radio frequency network controller's address. This address is used
by the devices to communicate with the BRUs attached to the controller.
The RF protocol handler, which enables a JANUS 2010 reader with
an RF Back to communicate as an end device in an RF network. RFPH
lets the reader transmit and receive data as specified by the RF
A cable made of normal, round insulated wires arranged side by side
and fastened together by a cohesion process to form a flexible ribbon.
An optional device for the printer that disengages the thermal transfer
ribbon while labels are being fed forward, or any other time printing
does not take place.
A board with expansion slots that is designed to connect to the
main PCB and holds additional PCBs or ISA cards.
Movement of a wireless node between two microcells. Roaming usually
occurs in infrastructure networks built around multiple access points.
A type of dynamic random access memory (DRAM). The JANUS 1MB reader
has 1MB of battery-backed DRAM. From the memory existing between
the 640K and 1MB boundaries, 384K is remapped or "rolled-over"
above 1MB to create the RAM drive. If you do not need the RAM drive,
you can access rolled-over memory as extended memory through a device
driver or an application that uses HIMEM.SYS.
Read only memory. Usually a small memory that contains often-used
instructions, such as microprograms or system software. ROM is programmed
during memory fabrication and cannot be reprogrammed.
A read-only memory drive. Drives C and D are ROM drives implemented
in flash memory on the reader.
A software and hardware connection between two or more networks
that permits traffic to be routed from one network to another on
the basis of the intended destinations of that traffic.
Assigning a path for message or file delivery. DCM routes messages
Widely recognized protocol standard for serial binary data interchange.
The standard covers the physical, electrical, and functional characteristics
of the interface. RS-232 is the standard American format for serial
data transmission by cable (that is, from a computer terminal to
a modem). RS-232 transmission uses a distinctive 25-pin connector,
although in most cases not all of the conductors are used. See serial.
Standard for the voltage and impedance levels for serial data transmission
on balanced lines. Similar to RS-232, but handles larger distances
and faster communication.
Standard for allowing multiple devices to share a common set of
serial data communication lines. The signaling is very similar to
RS-422. The maximum number of devices allowed is 32.
Room temperature vulcanizer. RTV is a silicone glue used to secure
Compile and run IRL program character. Sent by the host to indicate
the end of a downloaded program. Causes the reader to compile the
program. If the program compiles correctly, the reader runs the
Receive end of message first character. Enables or disables receiving
data and/or indicates the end of a data block in the receive data
event. Older Intermec products may not include these protocol characters.
Newer generation online reader products implement these protocol
Receive end of message second character. Enables or disables the
second character of the RX EOM and indicates the end of a data block
in the receive data event. Older Intermec products may not include
these protocol characters. Newer generation online reader products
implement these protocol acronyms.