Huawei E1550

[Aroxed]

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[Aroxed]

Hello.
I'd like to ask about Huawei E1550 initialization.
I use Delphi + WinApi functions like CreateFile, WriteFile and ReadFile in order to send commands and to get the results from the modem. However, sometimes the modem refuses to start responding to my commands. The only thing which helps is to run vendor's tools "HUAWEI Modem 3.5.exe". And when this tool has found the modem, I can work successfully.
Do you know if there is another way to "wake up" the modem if it does not respond?

Thanks in advance,
Andrii.