Chapter 5 - Basic Operations; Device Phone Number; Sending At Commands; Verifying Signal Strength - Multitech MultiModem iCell User Manual

Chapter 5 – 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>
0
1
2-30
31
99
<ber>
0
1
2
3
4
5
®
MultiModem iCell MTCMR User Guide
Received signal strength indication.
(-113) dBm or less
(-111) dBm
(-109) dBm - (-53) dBm / 2 dBm per step
(-51) dBm or greater
Not known or not detectable
Bit error rate, in percent
Less than 0.2%
0.2% to 0.4%
0.4% to 0.8%
0.8% to 1.6%
1.6% to 3.2%
3.2% to 6.4%
BASIC OPERATIONS
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