Chapter 3 – Using Your Wireless Modem
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Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide
Checking Network Registration and Roaming Status
To verify that the wireless MultiModem has been registered on the wireless network:
1.
Using HyperTerminal, type
AT+CREG?
The modem responds in one of the following ways:
Network Registration Verification
Value
Network Registration Status
0,0
The modem is not registered on any network
0,1
The modem is registered on the home network
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.
Checking the Modem’s Identity
Use the ATI command to check the modem’s identity.
1.
To display manufacturing data, type
ATI0
Note:
This command uses the capital letter I after
AT.
The command ends in a zero.
Manufacturing data displays, for example, Wavecom Modem Multiband G850 1900
2.
To display the software version, type
ATI3
The software version displays, for example, 651_09gg...
3.
To display modem data features, type
ATI6
Modem data features appear, such as data rates, data modes, fax classes.
Establishing a Voice Call
1.
Enter PIN code, if one is required by your wireless provider.
a.
Type
AT+CPIN=1234
b.
Responses include:
OK (PIN Code accepted)
+CME ERROR : 16 (Incorrect PIN Code)
+CME ERROR : 3 (PIN already entered [with +CMEE : 1 mode])
2.
To initiate a voice call:
a.
Type
ATD1234;
Note:
Don’t forget the semicolon “;” at the end, which indicates voice calls.
b.
Responses include:
OK (Communication established)
CME ERROR : 11 (PIN Code not entered [with +CMEE : 1 mode])
CME ERROR : 3 (Operation not allowed)
