Huawei E161 and ppp modem hangup

  • Hi all,

    sorry for posting here, but i wasn't sure where to ask.

    I got a O2 UMTS Stick and was trying to connect via ppp.
    Entering the PIN works, the LED changes from green to blue but when i start pppd it dies right after some IPCP requests with the error "Modem hangup".

    UMTSMON sais it's a E161, however it's original vendor/product-id  was 0x12d1:0x1446. I used usb_modeswicht which switches the id's to 12d1:1001.
    I got 3 ttyUSB devices and usbmon also displays valid data.

    Some hinds how to fix pppd would be very cool.

    Thanks a lot!