User guide

BASIC OPERATIONS
Basic Operations
Device Phone Number
Every device has a unique phone number. Your service provider supplies a phone number when you activate your
account, or if your device has a SIM card, the phone number may be on it. Wireless service provider
implementation may vary. Consult with your service provider to get the phone number for your device.
Sending AT Commands
AT commands allow you to configure, operate, and query your device. To send AT commands, use terminal
software such as HyperTerminal, TerraTerm, Kermit, or Putty.
Download the AT Command Reference Guide for your model from multitech.com/support.go.
Verifying Signal Strength
To verify the device signal strength, enter:
AT+CSQ
The command indicates signal quality, in the form:
+CSQ: <rssi>,<ber>
Where:
<rssi> Received signal strength indication.
0 (-113) dBm or less
1 (-111) dBm
2-30 (-109) dBm - (-53) dBm / 2 dBm per step
31 (-51) dBm or greater
99 Not known or not detectable
<ber> Bit error rate, in percent
0 Less than 0.2%
1 0.2% to 0.4%
2 0.4% to 0.8%
3 0.8% to 1.6%
4 1.6% to 3.2%
5 3.2% to 6.4%
MultiModem
®
iCell MTCMR User Guide 43