GV55NUsermanual
TRACGV55NUM001‐7‐
1 Introduction
The GV55N is a powerful GPS locator designed for vehicle or asset tracking. It has
superior receiver sensitivity, fast TTFF (Time to First Fix) and supports Dual-Band GSM
frequencies 850/900/1800/1900, its location can be monitored in real time or be
periodically tracked by a backend server or other specified terminals. The GV55N has
multiple input/output interfaces that can be used for monitoring or controlling external
devices. Based on the integrated @Track protocol, the GV55N can communicate with a
backend server through the GPRS/GSM network to transfer reports of Emergency,
geo-fence boundary crossings, low backup battery or scheduled GPS position as well as
many other useful functions. Users can also use GV55N to monitor the status of a vehicle
and control the vehicle by its external relay output. System Integrators can easily setup
their tracking systems based on the full-featured @Track protocol.
Table 1. GV55N Protocol Reference
SN Document name Remark
[1] GV55N @Track Air Interface Protocol The air protocol interface between
GV55N and backend server.
Table 2. Terms and Abbreviations
Abbreviation Description
AGND Analog Ground
AIN Analog Input
DIN Digital Input
DOUT Digital Output
GND Ground
MIC Microphone
RXD Receive Data
TXD Transmit Data
SPKN Speaker Negative
SPKP Speaker Positive
1.1. Reference
1.2. TermsandAbbreviations
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