OnCell G2100 Series User’s Manual
AT Command Set
4-6
Signal Strength Verification
0 to 12
Weak or insufficient
13 to 19
Average
20 to 31
Exceptional
99 No
signal
BER ranges from 0 to 7, with 7 corresponding to a higher error rate.
ATTENTION
RSSI should be higher than 12 if you wish to create or accept GSM/CSD data calls or establish a
GPRS connection. If the RSSI is less than 12, you will only be able to transmit and receive SMS
(short message).
Another way to verify RSSI is to check the “SIGNAL” LEDs on the front panel. See Chapter 2
for more information.
Radio Band Selection
Although GSM-900 and GSM-1800 are used in most parts of the world, operators in United States,
Canada, and many other countries in the Americas use GSM-850 or GSM-1900. A quad-band
industrial cellular modem such as the OnCell G2100 Series modem makes it relatively easy to
prepare the product for shipment to different parts of the world.
The GSM/GPRS band of OnCell G2100 Series is configured to 900/1800 MHz by default. For
users NOT in this service area, follow the instructions below to set up the correct radio bands.
ATTENTION
The following procedures can also be carried out using OnCell Configurator
1.
Connect the RS-232 port of the OnCell G2100 Series modem to a host PC. Start
PComm Terminal Emulator using the current communication parameters (default: 115200
bps, 8 data bits, None parity, 1 stop bits, and no flow control).
2.
Type
AT+WMBS=x,
where x represents one of the band selections shown in the following
table, and then press
Enter
.
Radio Band Selection
0 Mono-band,
850
MHz
1
Mono-band, 900 MHz
2
Mono-band, 1800 MHz
3
Mono-band, 1900 MHz
4
Dual-band, 850/1900 MHz
*5
Dual-band, 900/1800MHz (default)
6
Dual-band, 900/1900MHz
