Appendix D: Important Safety Information and Glossary
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Glossary
2G:
Second-generation mobile networking technology. Represents a switchover from
analog to digital; most 2G networks use GSM.
3G:
Third-generation mobile networking technology that enables simultaneous
transfer of voice and non-voice data; most 3G networks use WCDMA.
3.5G:
A more recent standard of mobile networking technology; generally uses
HSDPA.
3.75G:
A more recent standard of mobile networking technology; generally uses
HSUPA.
4G:
A more recent standard of mobile networking technology; generally uses LTE.
APN (Access Point Name/Network):
Provides GPRS routing information. Consists
of:
Network ID:
Identifies the external service requested by a GPRS user.
Mobile network operator ID: Specifies routing information.
ARFCN (Absolute Radio Frequency Channel Number):
The specific ID numbers
for all radio channels used in cellular mobile communications.
bps (bits per second):
How data flow is measured.
CHAP (Challenge Handshake Authentication Protocol):
CHAP identifiers are
changed frequently and authentication can be requested by the server at any
time.
DNS (Domain Name System):
Helps route network traffic by making the addressing
process more user-friendly.
DHCP (Dynamic Host Configuration Protocol):
How devices obtain IP addresses
from a server.
DUN (Dial-Up Network):
Windows component that enables online access via a
modem.
EDGE (Enhanced Data GSM Environment/Enhanced Data for Global Evolution):
Advanced GPRS that delivers multimedia and other data needing greater
bandwidth at up to 237 kbps.
eHRPD (Evolved High Rate Packet Data):
An upgrade of the existing
HRPD (High
Rate Packet Data)
and EV-DO (Evolution-data Optimized) network technology to
allow smooth transitioning from 3G mobile network technology to 4G LTE
network technology.
GPRS (General Packet Radio Service):
Delivers data in packets at up to 86 kbps.
GSM (Global System for Mobile Communications):
The most popular cellular
network, mostly operates in 850-900 or 1800-1900 MHz; the primary 2G system.
HSDPA (High Speed Downlink Packet Access):
Advanced WCDMA that delivers
downlink bandwidth intensive data at up to 7.2Mbps; typically associated with
3.5G.