OnCell G2100 Series User’s Manual Getting Started
2-11
Serial Interface SW1 SW2 SW3
RS-232 ON OFF OFF
RS-422 OFF OFF OFF
4W RS-485 OFF ON OFF
2W RS-485 OFF ON ON
Termination Resistor SW4
Enabled ON
Disabled OFF
Pull High/Low Resistor SW5 SW6
1 KΩ ON ON
150 KΩ OFF OFF
LED Indicators
Name Color Function
SIGNAL
(3 LEDS)
Green Signal level (data transmission requires at least 2 bars)
PWR Green DC power connection
GSM Amber
Steady: GSM/CSD connected
Blinking: SMS Tunnel is enabled (registered to a carrier)
GPRS Amber GPRS connected
DATA Green Serial Tx/Rx
Signal LEDs Function
None No signal or SIM card not installed properly
1 bar Weak or insufficient signal (SMS only)
2 bars Average signal (GSM/CSD and GPRS connections)
3 bars Exceptional signal (GSM/CSD and GPRS connections)
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