WIP AT commands causing modem to hang?

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1

Hi, has anyone here experienced modem hanging sometimes when using WIP AT commands? I’m experiencing this very often and this makes a real-life application impossible. When it hangs, the modem signal light still flashes, but there’s no way to communicate with the modem via serial port.

2

Specifically, after issuing a WIP command, i get the following response and it hangs from there. I am at my wit’s ends, hope someone can help. thks.

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3

Is this the same: https://forum.sierrawireless.com/t/oe-and-y-characters-returned-from-modem/5022/1 :question:

4

I’m not exactly sure, but last week I found out that the modem can also hang with a simple AT+CMGL=4. Although less common.

By the way, I’m using the USB GL6110 under Windows 2008 Server, could the issue be the USB driver? Will changing the baud rate help?

I like to add that disabling and enabling the modem via Windows device manager won’t resolve the issue. In the meantime, the modem light is still blinking.