User manual

Xact Application User Manual
Xact Application User Manual Page 9
AGPS
 refers to Assisted GPS, which is a system that can improve the time-to-
first-fix (TTFF) for GPS. Whereas standalone GPS radio relies on signals from
satellites, AGPS additionally uses network resources to locate and utilize the
satellites faster  as well as better in poor signal conditions.
To use this feature, you need to supply the latitude and longitude of the device.
This is so that ephemeris data is sent only for those satellites currently visible to
the mobile device requesting the data, thus minimizing the amount of data
transferred (and thus cost as well).
Additionally, login credentials (username and password) is embedded to access
the u-Blox server with the ephemeris data and developers need to embed their
own login/password in the application firmware. Currently we have a test
accoount login/password.
Band
The Sierra Wireless WMP 100 GSM/GPRS/EDGE Rx microprocessor can operate
on four frequency bands: 850, 900, 1800, and 1900 MHz. In this panel, you can
 a new band or bands.
Get Band Setting. The band(s) will be
shown in the adjoining drop-down list.
To set a new band or bands, select from the drop-down list; the available values
are: 850, 900E, 1800, 1900, 850 and 1900, 900E and 1800, and 900E and 1900.
Select the desired band(s) based on your wireless carrier and geographic region
where the device operates.
APN Settings
a configurable network identifier
used by a mobile device when connecting to a GSM carrier. The carrier will then
examine this identifier to determine what type of network connection should be
created, for example: what IP addresses should be assigned to the wireless device,
what security methods should be used, and other connection details.

Get APN Settings button. The
settings will be shown in the adjoining fields.
To set a different APN, enter the address, username, and password in the labeled
fields. The address must be in symbolic form (e.g., internet.mnc012.mcc345.gprs).
Then press the Set APN Settings button to transfer the settings to the device.