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Glossary
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ERI
E
nhanced Roaming Indicator is a feature
to indicate whether a mobile phone is on
its home system, a partner network, or a
roaming network. Many phones indicate
home vs. roaming as an icon, but ERI
capable phones can clearly indicate third
“partner network” status.
EVDO
Ev
olution Data Only or Evolution Data
Optimized (abbreviated as EVDO, EV-DO,
EvDO, 1xEV-DO or 1xEvDO) provides
fast wireless broadband access (3G)
anywhere, without needing a WiFi
hotspot.
GPS
G
lobal Positioning System is a system of
satellites, computers, and receivers able to
determine the latitude and longitude of a
specific receiver on Earth. Position is
calculated using time and distance.
IS 2000
Type of digital signaling. It's the second
generation of CDMA digital cellular, an
extension of IS-95. Differences between
signaling types have to do with pilot
signal and links to provide more traffic
channels, and control protocols.
NAM
N
umber Assignment Module is how the
phone stores the phone number and its
electronic serial number.
SSL
S
ecure Sockets Layer Protocol used to
encrypt data sent over the air.
TTY
T
eletypewriter. An electromechanical
typewriter that either transmits or
receives messages coded in electrical
signals. A phone with TTY support is able
to translate typed characters to voice or
translate voice into characters to display
on the TTY.