User's Manual

GV55VC User manual
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1 Introduction
The GV55VC 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
CDMA2000-1x frequencies 800/1900, its location can be monitored in real time or be
periodically tracked by a backend server or other specified terminals. The GV55VC has
multiple input/output interfaces that can be used for monitoring or controlling external
devices. Based on the integrated @Track protocol, the GV55VC can communicate with a
backend server through the CDMA2000-1x 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 GV55VC 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.
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1.1. Reference
Table 1. GV55VC Protocol Reference
SN  Document name  Remark
[1]  GV55VC @Track Air Interface Protocol The air protocol interface between
GV55VC and backend server.
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1.2. Terms and Abbreviations
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
TRACGV55VCUM001 - 7 - 