5.5.1 GSM Setup


There is no software required to configure the GSM modem. The modem must be set up using an Ethernet connection to a PC.

Figure 5-9 GSM/CDMA Modem

An Account must be set up with a local GSM cellular service carrier. To activate the modem, you will require an IP Address supplied by the service carrier to be assigned to the modem. They will also provide you with an activated SIM card.

The following are the steps required to set up the GSM modem:

  1. Attach the antenna to the modem.
  2. Insert your SIM card (not included) into the top (primary) spot of the modem (see illustration below).
  3. Figure 5-10 Inserting SIM Card


    There are two SIM card slots in the modem. Install the SIM card in the upper slot, with the chamfered corner inserted first. The contacts should be face down.

  4. Connect the Ethernet Cable (null modem cable) from the modem to your PC.
  5. Note:

    If more support documentation is required to setup the GSM modem, please visit: digi.com/support/ and select Digi Connect WAN IA from the "Select a product" drop-down menu to browse various support documents.

  6. Use the STS Remote Station with your connected battery, STS Controller, and Distribution Box to connect the modem to a power supply. Turn the modem on using the Modem Control option in the STS Controller.
  7. Note:

    Steps 5 and 6 are based on the Windows XP Operating System. Other Operating Systems may require another path to access the Local Area Connection Status.

  8. After the connection has been established, you should see the message as shown in Figure 5-11 at the bottom right of your PC screen. Doulbe-click the network icon.
  9. Figure 5-11 Local Area Connection Confirmation

  10. If using Windows XP, in the Local Area Connection Status window, the Support tab should display the same Default Gateway and Subnet Mask, as shown in Figure 5-12. The IP Address does not have to match, but it should begin with 192.168.1.XXX (XXX is any number between 2 and 255), thus matching the Default Gateway. Close the window.
  11. Note:

    It is recommendd to set the TCP Port to 49200 if using a Windows 7 computer, and 49800 if using Windows 8.

    Figure 5-12 Local Area Connection Status Window

  12. Open your web browser and enter the IP Address "" in the URL address bar. The main configuration menu of the modem will be displayed.
  13. Select "Mobile" under the Configuration menu.
  14. Figure 5-13 GSM Mobile Configuration

  15. Make sure the Service Provider selected is correct, and the Service Plan/APN is set to "internet.com". Click on "Serial Ports" under the Configuration menu and click on the Port that is available. This should be Port 1 by default.
  16. In the Port Profile window, select "TCP Sockets" and click Apply.
  17. Make sure the Serial Port Configuration matches the screen in Figure 5-14. Enter the IP Address provided by your Internet Service Provider in the IP Address field. The TCP Port should be set to either "49152", "49200", or "49800" depending on your setup and Operating System. When finished, click Apply.
  18. Figure 5-14 Serial Port Configuration

  19. Select Basic Serial Port Settings to set up the communication parameters. The following settings should be entered:
    • Baud Rate: 115200 bits/second
    • Data Bits: 8
    • Parity: None
    • Stop Bits: 1
    • Flow Control: None
    When finished, click Apply.

In the STS Controller Main Menu select "STS Gold Setup", then select "Modem Port Setup". Enter the same settings as above for the Baud Rate, Data Bits, Parity, Stop Bits and Flow Control.

The modem is now configured and ready to be used with the STS Telemtry System.