Support forum

Hello Joakim,

'Dongle' style USB GSM modems sometimes are a bit hit or miss. A modem that might work well on one computer or version of Windows might not work reliably on another computer or even on the same computer with another version of Windows. Compatibility with the mobile network might also be an issue, sometimes a GSM modem works flawlessly on one network and not very well on another network.

Sometimes it helps to update the firmware and USB driver for the modem but there is very little you can do in Diafaan SMS Server when the modem behaves unreliably. The only thing you can try is to set the 'RebootBeforeInitialization' property in the advanced options of the GSM Modem Gateway to 'True'. When this option is active, Diafaan SMS Server will send a full reboot command to the modem when a problem occurs.

Unfortunately, the reboot option does not always work properly for USB modems and it might cause more problems than it solves. That is the reason that this option is only enabled by default for serial port and LAN modems and disabled for USB modems.

Regards, Henk