On Premise Software Help Resource : Help TopicsFailed to open COM port

This error means the COM port associated with the SMS line cannot be opened. The error maybe caused by:

• The modem/mobile phone is not connected to the computer.
• The modem/mobile phone is not recognized by the computer. Try to unplug the device, plug in again, and restart the software.
• The COM port is currently used by other software. For example, the “Zoom 7.2M tri-band modem” software is running. If it is the case, right click on the Zoom modem icon on the Windows taskbar, select Exit. Then restart the gateway.