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Chapter 2 – Getting Started
Multi-Tech Systems, Inc. MultiModem Wireless Modem with Ethernet Interface (S000375F) 14
AT Command for Verifying Signal Strength
1. In the command window, type AT+CSQ
2. The modem responds with the received signal strength (rssi) and the channel bit error rate (ber).
RSSI ranges from 0 to 31. BER ranges from 0 to 7 (7 is the highest error rate).
Signal Strength
–
RSSI
10 - 31 Sufficient
0 - 9 Weak or Insufficient
99 Insufficient
Note: Sprint models will respond differently. Please refer to the CDMA AT Command Reference Guide.
AT Command for Checking Network Registration and
Roaming Status
Use this command to verify that the wireless MultiModem has been registered on a wireless network.
1. In the command window, type AT+CREG?
2. The modem will respond in one of the following ways:
Network Registration Verification
V
alue Network Registration Status
+CREG: 0,0 The modem is not registered on any network
+CREG: 0,1 The modem is registered on the home network
+CREG: 0,5 The modem is registered on a network and it is roaming
Note: If the modem indicates that it is not registered, verify the signal strength to determine if the
problem is the strength of the received signal.
Exiting Modem Mode
1. After the last AT Command is entered, press:
CTRL + ] (the right bracket).
2. The following prompt displays:
telnet>
Type quit and press Enter.
3. Then the following prompt displays:
c:>
Type exit and press Enter.