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A
Appendix A: Glossary
1xEV-DO Evolution Data Optimized -- An evolution of cdma2000® 1x
technology and is an 3G standard. 1xEV-DO provides peak
data rates of up to 2.4 Mbps. Also known as high data rate, or
HDR, providing high-speed, hig h-capacity wireless Internet
connectivity, and is optimized for packet data services. EV-DO
only addresses data - not voice. It requires a dedicated slice of
spectrum, separate from voice networks using standards such
as 1xRTT.
1xRTT One Times Radio Transmission Technology (the ʺone timesʺ
refers to the frequency spectrum), a 3G standard technology
that supports speeds up to 144 kbps.
2G Second generation - 2G data transfer uses as much network
capacity as any other call, and uses that capacity for the
duration of the connection, regardless of whether data is being
transmitted at any one moment. In contrast, the newer 3G
standard is much faster for data, and only uses network
capacity when data is actively being transmitted
.
3G Third generation—A new generation of wireless systems,
including cdma2000 1xRTT and 1xEV-DO, that provides high-
speed data transmission (144 kbps and higher) and Internet
Protocol (IP) based services in fixed, portable and mobile
environments.
bps bits per second—The actual data speed over the transmission
medium. See also baud.
carrier A wireless network service provider, licensed to use radio
frequencies in particular regions.
CDG CDMA Development Group. Consult
www.cdg.org. Also a
series of three test suites required to certify a device for use on
a CDMA network.
CDMA Code Division Multiple Access—A wideband spread
spectrum technique used in digital cellu lar, personal commu-
nications 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 uniq ue digital code,
which differentiates the individual conversations on the same
channel.
CDMA2000 1X Also known as 1xRTT, this is a high-speed standard for CDMA
cellular communications.