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19. The terminal window connected to the 819-GPRS modem, will say "RING" and then once the
modems have negotiated a connection it should say "CONNECT 9600/RPL" for a 9600 baud
connection.
20. You can now type in text in either terminal window and it will appear in the other terminal
window. This means that your modem is now answering incoming CSD data calls.
21. Type in +++ (do not hit Enter key) to enter command mode and then type ATH to disconnect
the call.
22. Once you can originate and terminate CSD calls with the modem you are ready to connect the
modem to your equipment. Please ensure that your equipment is configured to your required
data rate, i.e. 9600 bps.
Packet Data Call Setup Steps
1. Create a 19,200 Generic Modem or, use the Network Connection created in Section 3 using the
GPRS 819S Driver, and configure it for 115,200, 8 bits, no parity, 1 stop bit. Attach the modem
to an active COM port on the PC, i.e. COM1.
2. Configure the selected COM port to a maximum speed of 115,200 in the Hardware device
manager.
3. Insert the SIM card into the unit.
4. Attach the antenna and power to the 819-GPRS modem.
5. Connect it to the COM port with a 9 pin RS-232 straight through serial cable.
6. Use HyperTerminal on the COM port to set the Carrier Detect (DCD) to follow its connection state
to the Cellular Network, set AT&C1. The yellow LED will turn on when connected to the Carrier,
and turn off when not connected. A value of AT&C0 sets CD to always be on, and a value of
AT&C2 sets CD to be always on, but to wink when there is a change in the connection state.
7. Ensure that DTR is set to terminate the call and return the modem to command state on an ON-
to-OFF transition of DTR with AT&D2. A value of AT&D0 ignores DTR, a value of AT&D1 enters
online command state upon an ON-to-OFF transition of DTR but retains the current call.
8. Set the GPRS persistent context definitions to non-volatile by issuing the command
AT^SCFG=GPRS/persistentcontexts,1. GPRS persistent context will not be reset by AT&F.
Define the Access Point Name (APN) for the cellular provider by issuing the AT+CGDCONT=1,
IP, <APN> command (example; AT+CGDCONT=1, IP, ISP.CINGULAR).
Save the new configuration with the AT^SMSO command. This will save settings and shutdown
the module. The modem should re-start and display "^SYSSTART".
9. To confirm your settings, perform an AT&V. This will print out several lines of text with all the
register values.
10. Confirm that you are registered on the cellular network. Enable URC to report status of network
registration including location information using the command AT+CREG=2. Type AT+CREG?.
The reply should be similar to +CREG: 2, 1, "7D0A", "7E4D", where the 1 indicates registration
on the home network, 7D0A is the location area code in hex, and 7E4D is the cell ID in hex.
11. Exit HyperTerminal.
12. Create a Dial-Up Networking (DUN) connection using the modem that 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. Refer to Section 3.
13. Start a DUN session by double clicking on the DUN icon that was created.
001-0003-829 Revision 1
Page 24 of 65
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