Modem Failure

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Yonathan Benhamou
New member
Username: Ybenhamou

Post Number: 1
Registered: 12-2019
Posted on Monday, December 23, 2019 - 10:40 am:   


I run Now SMS with a USB Modem. I works great, but from time to time it crashes and I get this message:

Modem Failure -- Unable to access modem, ensure that it is powered on and passes diagnostic tests.

And then I need to unplug and replug the modem to get it working again. I changed computer, and modem (switch from D-Link to Qualcomm), and it still happens.
Problem is tha I don't know when it happens so I never now if My SMS are deliverd or not.

How can I find out the problem?

Des - NowSMS Support
Board Administrator
Username: Desosms

Post Number: 6079
Registered: 08-2008
Posted on Monday, December 23, 2019 - 07:04 pm:   


It’s not an ideal solution, but in our experience USB modem drivers sometimes lock up, and the only way to recover is to reboot Windows. There is a configuration option to automatically reboot if the modem becomes inaccessible. It is described in more detail here:

NowSMS Support
Yonathan Benhamou
New member
Username: Ybenhamou

Post Number: 2
Registered: 12-2019
Posted on Tuesday, December 24, 2019 - 06:14 am:   

Thanks for your answer.

Actually, rebooting won't be an option as this computer is used for other purposes as well, but I've found a way to restart modem without unplugging it, using devcon.exe.

Question is : how can I trigger this command from NowSMS when there is an error?
Also, I don't see where I could configure alerts in NowSMS for errors. I have Now SMS lite.

Thanks for your help.

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