fighting with ZTE usb-modem

[Denis Lagno <dlagno%rambler.ru@localhost>]

Hi guys,

I've got EV-DO USB modem ZTE AC5710.  When plugged in it presents itself 
as cd-rom storage.  I can mount and read it under netbsd.

I've read how similar ZTE modems were harnessed under linux: they use 
some way to switch it to umodem mode: for that some just issue cd-rom 
eject command, others use usb_modeswitch utility.  Then they do modprobe 
usbserial and it recognizes serial lines.

When I attempt to issue cdrom eject command nothing happens.  So 
question is: how can I force netbsd to recognize umodem/ucom?

-- denis