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10.
Confirm you are registered on the cellular network with AT+CSS? A reply of +CSS? 2,Z,99999
indicates you are not registered. It may take up to 15 seconds after power-up to register on the
network. Once registered a typical response will be +CSS?:1,A,4152 where 1 is the band class,
1=800 MHz, 2=1900 MHz, A-F is the band (Z indicates not registered on network), 4152 is the
SID, i.e. the cell tower ID, (99999 indicates not registered on network).
11.
Exit HyperTerminal.
12.
Create a Dial-Up Networking (DUN) connection using the modem you created with the active
COM port (i.e., COM1) in Network and Dial-up Connections. Configure it to 115,200 bps and set
security to Typical.
13.
Start a DUN session by double clicking on the DUN icon.
14.
Set the username and password as defined for your carrier.
15.
Enter the phone number as #777 with no area code and click on Dial.
16.
The modem will dial out and attempt to connect.
17.
If the configured baud rate for the modem, the COM port, the modem and the DUN do not
match, the DUN will not talk to the modem properly and you will get a hardware error message.
Otherwise the DUN will contact the cellular network and authenticate the user on the network.
18.
Once connected, you can browse the Internet through the DUN session. To confirm this, disable
any other network connection you may have running.