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iR1200 Modem
104 nextel.com
through. Circuit Switch was originally developed for the analog-based
telephone system in order to guarantee steady, consistent service for two people
engaged in a phone conversation.
Command Mode
The mode that accepts AT commands. Also known as Terminal Mode. When
your modem is in this mode, it is waiting to receive AT commands that you
type from your communication software.
Communication Software
A computer program designed to connect your computer to an external source,
such as another computer or a fax machine.
Configuration
The term configuration defines the hardware components that comprise a
subsystem and system. It is a set of conditions or parameters that define the
structure of an item such as the GPS processing and characteristics of the RS-
232 interface ports.
Data Services
One of the functions of your iDEN
modem. Data services uses both circuit-
switched and packet data transmissions.
DCD
Data Carrier Detect. An acceptable carrier signal received by the modem over
the modem line. Also known as Received Line Signal Indicator (RLSI).
DCE
Data Communication Equipment. The equipment that establishes, maintains,
and terminates a connection. It converts data into units of sound and vice versa
for communication over telemodem or cellular networks.
Default
A factory preset choice that, under normal circumstances, works best for your
system. You can either accept the default or change it.
Differential Capable
A term used to describe a GPS receiver capable of receiving and applying
differential GPS corrections.