Sprint Nextel U727 - Manual (Page 136)

128 Section 3B: Location Based Services
What is the GPS Control Plane?
It refers to GPS requests that are executed at the server level
via the network.
What is NMEA?
NMEA (National Marine Electronics Association). NMEA 0183
is a standard protocol used by GPS receivers to transmit data.
NMEA output is composed of various strings. Sprint GPS
devices support the following strings: $GPGGA, $GPRMC,
$GPGSA, and $GPGSV.
When do I need NMEA?
You only need NMEA when using GPS applications that
require an NMEA output stream. We recommend not
activating the NMEA stream unless one is going to use it, to
ensure the best possible data performance on the device.
What GPS mode options are supported?
GPS on your device worksthe same as on any other GPS
device. Sprint provides two types of GPS options: GPS Basic
and GPS Premium. Also, GPS services are not supported in
EVDO Only Mode and the device must be set to Automatic or
1xRTT Mode.
What is GPS Basic?
GPS Basic is a mode that allows your device to be used for
regular GPS outdoor use. In this mode GPS receivers require
an unobstructed view of GPS satellites, and often do not
perform well within forested areas or near tall buildings.
Sprint GPS Basic is based on GPSone standards and uses LBS
for the first fast GPS fix. GPS coordinate values are made
available for applications via a local GPS NMEA com port.