Velocity Edge GX440 User's Guide download pdf (Page 121)

GPS Configuration

Rev 2.3 Feb.12 121

National Marine Electronics Association (NMEA)

National Marine Electronics Association (NMEA) is a protocol by which marine

instruments and most GPS receivers can communicate with each other. NMEA

defines the format of many different GPS message (sentence) types, which are

intended for use by navigational equipment.

An example of a tracking application using NMEA is Microsoft Streets and Trips.

Tip: For more information on the AirLink device supported NMEA message formats,

please refer to the Appendix.

Trimble ASCII Interface Protocol (TAIP)

Trimble ASCII Interface Protocol (TAIP) is a digital communication interface based

on printable ASCII characters over a serial data link. TAIP was designed

specifically for vehicle tracking applications but has become common in a number

of other applications, such as data terminals and portable computers, because of

its ease of use.

An example of a tracking application using TAIP is DeLorme Street Atlas USA.

Tip: For more information on TAIP message formats, refer to the Appendix and to the

Sierra Wireless MP 3G device TAIP Reference.

Before Configuring GPS

To decide what configuration you need for your AirLink device, there are some

fundamental considerations you should determine:

•Protocol: What is the GPS protocol used by your tracking application and

what type of reports will you need?

• Dynamic IP Address: Will you need DNS support to handle a dynamic IP

address account?

• Multiple GPS servers: Will you need to have GPS data send to more than

one GPS server?

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Velocity Edge GX440 User's Guide Page 121