after the buffer is filled. While the buffer of data transmission via satellite is being filled, the presence
of WiFi and GSM network is verified. If one of them appears and data are successfully transmitted, the
data from the satellite buffer are removed from the transmission.
In the Variant 2, if a GSM network is completely absent, it is advisable to disable the GSM
transmitter in the configuration to increase the speed of transmission over satellite communication
channel.
In the modifications with Bluetooth interface, all transmitters are located on Channel 2. For
the NAVISET GT20 BT/WiFi modification priorities of the transmitters and time of switching between
them should be set. For example, if GSM is constantly present and WiFi occurs very rarely, it is
advisable to set GSM as priority transmitter and 5-10 minutes for time of switching and testing of WiFi
networks. If WiFi appears from time to time, it is better to let WiFi remain high-priority and to transmit
data via GSM only after filling the buffer, the size of which is defined by the user
.
5.2. APPEARANCE AND HARDWARE VERSIONS OF NAVISET GT-20
All the necessary interfaces for connection are located on the side of the device. Various
modifications of GT-20 PRO have differences in hardware and the front panel color. Therefore, the
appearance may differ from the base platform.
The sketches of the appearance of the products and their modifications are given below
GSM
GNSS
WiFi
VOICE
INTERFACE
SDcard
SIM1
PWR CPU GNSS GSM SAT WiFi
GSM
GNSS
WiFi
VOICE
INTERFACE
SDcard
SIM1
PWR CPU GNSS GSM SAT WiFi
modification of execution 1
modification of execution 2
GSM
GNSS
IRIDIUM
VOICE
INTERFACE
SDcard
SIM1
PWR CPU GNSS GSM SAT WiFi
modification of execution 3
