Procedure to installing Sierra Wireless GL7600 Modem 
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1). To install the USB driver, extract the zip to the PC you want to install the modem, and then setup.exe - \USBDriver\setup\setup.exe

2). Carefully insert SIM card (only 4G SIM card is supported) into modem, connect to power supply and PC.  The modem green indicator light should turn on.
  
3). Go to "Windows Control Panel -> Device Manager -> Modems -> IMC Mobile Phone Modem", right click on "IMC Mobile Phone Modem,", select Properties and click on Modem Tab to see the COM port to use in your AlertDispatcher application.

4). Install AlertDipatcher (min. v7.0) and configure the COM port obtained in STEP 3 under Modem Setup.  If you do not have the CDROM, you can download AlertDispatcher installer from the following link - http://www.clickndeploy.com/clients/downloads.php?action=displaycat&catid=8

*Note:- If you're not able to send SMS, please check if the indicator green light is blinking.  If it's not blinking, this means your modem is not connected to 4G network.  Verify with your operator that your SIM card is 4G enabled.

