Symbol PTC-870IM, Руководство пользователя

Страница: 63 / 72

CTS
Clear-to-send signal. CTS indicates that the line
between a modem and a terminal device is clear for
transmission. CTS typically follows a raised
request-to-send (RTS) signal.
data
communication
The transport of encoded information from one point
to another.
DATASPAN
Telxon’s spread spectrum radio.
DCE
Data communications equipment. A device that
controls and converts incoming data or
communication. For example, a modem.
desiccant
cartridge
A cartridge inserted into freezer units to absorb
internal moisture in the PTC.
digital
Discrete variable pulses or signal levels that
represent continuously variable physical quantities.
display
The screen on the front of the PTC. It is used to show
data entered into the PTC and warning prompts.
DSR
Data set ready signal. The modem sends DSR to the
attached device to indicate that the modem is
connected, on, and ready.
DTE
Data terminal equipment. A device comprising the
data source. For example, the host computer.
DTR
Data terminal ready signal. The signal sent by the
terminal device to the modem to indicate that the
terminal is ready for transmission.
EL
Electro-luminescent. An EL panel display screen is
available as an option for the PTC-870IM. This screen
does not have a backlight but can be used in colder
temperatures than an LCD screen.
ESD
Electrostatic discharge.
file
Any group or collection of related information stored
in memory. To add data to a file or to read data from a
file, the program must access the file by its file name.
61