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Glossary
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.