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Rev 1.0 Mar.04 33
Appendix A: Glossary
1X
One Times Radio Transmission Technology (the "one times" refers to the frequency
spectrum)
bps
bits per second—The actual data speed over the transmission medium. See also
baud.
CDMA
Code Division Multiple Access—A wideband spread spectrum technique used in
digital cellular, personal communications services, and other wireless networks.
Wide channels (1.25 MHz) are obtained through spread spectrum transmissions,
thus allowing many active users to share the same channel. Each user is assigned
a unique digital code, which differentiates the individual conversations on the same
channel.
CDMA 1X
Also known as 1X, this is a high-speed standard for CDMA cellular communica-
tions.
circuit switched cellular
V.xx modem communications over a cellular network. It uses a dedicated
connection circuit, in contrast to packet-switched. The user is charged by the
carrier for the duration of the connection.
ESN
Electronic Serial Number—The unique serial number assigned to the modem for
cellular network use.
FCC
Federal Communications Commission—The U.S. federal agency that is respon-
sible for interstate and foreign communications. The FCC regulates commercial and
private radio spectrum management, sets rates for communications services, deter-
mines standards for equipment, and controls broadcast licensing. Consult
www.fcc.gov.