11
LED indications
Table 3 Navigation LED indications
Behaviour
Meaning
Permanently switched on
GNSS signal is not received
Blinking every second
Normal mode, GNSS is working
Off
GNSS is turned off because:
Device is not working or Device is in
sleep mode
Blinking fast constantly
Device firmware is being flashed
Table 4 Status LED indications
Behaviour
Meaning
Blinking every second
Normal mode
Blinking every two seconds
Sleep mode
Blinking fast for a short time
Modem activity
Off
Device is not working or Device is in
boot mode
Characteristics
Basic characteristics
Table 5 Basic characteristics
Module
Name
TM2500
Technology
GSM, GPRS, GNSS, BLUETOOTH
GNSS
GNSS
GPS, GLONASS, GALILEO, BEIDOU,
SBAS, QZSS, DGPS, AGPS
Receiver
33 channel
Tracking sensitivity
-165 dBM
Accuracy
< 3 m
Hot start
< 1 s
Warm start
< 25 s
Cold start
< 35 s
Cellular
Technology
GSM
2G bands
Quad-band 850 / 900 / 1800 / 1900
MHz
Data transfer
GPRS Multi-Slot Class 12 (up to 240
kbps), GPRS Mobile Station Class B
Data support
SMS (text/data)
