Instruction manual

LS300G GSM/GPRS/EDGE/HSPA+ Sierra Wireless Cellular Modem
8. Operation
8.1 Ports
RS-232
The RS-232 port is the main port used with Campbell Scientific dataloggers.
Its function is described throughout this manual.
USB
The USB Port is not used in Campbell Scientific applications.
Ethernet
The Ethernet port may be used in place of PPP Mode to get to the IP stack of
the datalogger. However, this method comes with higher current drain for both
the modem and the datalogger. See Appendix D, Using the LS300G Ethernet
Port
(p. D-1), for more information.
8.2 LED Indicator Lights
When your LS300G is connected to power and an antenna, there is a specific
pattern to the lights to indicate its operation mode.
LED Color Coding:
• Off – No activity
• Red – No functionality
• Yellow – Limited functionality
• Green – Full functionality
• Blinking – Altered or reduced functionality
Network LED – monitors the cellular network
• Red – no cellular coverage
• Flashing red – attempting to connect to cellular network
• Yellow – cellular network found, modem connecting
• Flashing yellow – unable to authenticate on the network
• Green – connected to cellular network
• Flashing green – roaming
Signal LED – shows the strength of the cellular signal
• Flashing red – no signal (RSSI worse than –110 dBm)
• Red – poor signal (RSSI between –100 and –110 dBm)
• Yellow – marginal signal (RSSI between –85 and –100 dBm)
• Green – good signal (RSSI better than –85 dBm)
Activity LED – indicates whether data are currently being transferred
• Off – normal
• Flashing green – transmitting or receiving
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