Hello Lonnie, thank you for the quick reply!
But let me a bit disagree with your point - there are some locations where 3G/HSDPA is the only available internet option. In our country prices for 3G internet are as low as 10 USD/month (4GB of traffic included). This makes it the best and the only alternative in some cases and locations. Regarding the latency, you're right it is high for VoIP applications. But tests we have performed show that it is still absolutely usable, in our tests we were able to get adequate voice quality even over 2G networks with GSM codec. Another reason for supporting 3G dungles is its built-in Voice support present in many models. As far as I know such dongles can be used by Asterisk as a cheap VoIP/GSM gate solution. It would be just great if Astlinux would support those devices as well. Now back to my question. This 'combo' problem is not persistent anymore since 2.6.20 kernels. Quote: > E220 is supported natively in Linux kernels 2.6.20 and later, using the > usbserial.ko (usbserial-generic interface) module. > Also usb_storage.ko is aware of HUAWEI E220 modem and no further action needs > to be taken. > The following need to be compiled into the kernel (this does work) or > available as modules: > > CONFIG_PPP > CONFIG_PPP_FILTER > CONFIG_PPP_ASYNC > CONFIG_USB_SERIAL > CONFIG_USB_SERIAL_GENERIC > CONFIG_USB_SERIAL_OPTION So this still requires some more kernel options to be activated and usb-modeswitch (or alternative) tool should be present as well. Would you please suggest me the simpliest way I can have a workaround for this? Or maybe you can still consider adding this support to upcoming Astlinux versions or SVN trunk?.. That would be highly appreciated... Thank you in advance, Dmitry P.S. Good howtos on this topic: http://wiki.debian.org/Huawei/E220 http://oozie.fm.interia.pl/pro/huawei-e220/ On Jul 28, 2011, at 16:38 , Lonnie Abelbeck wrote: > Dmitry, > > It is a lot more complicated than just enabling CONFIG_USB_SERIAL_GENERIC > (actually CONFIG_USB_SERIAL_OPTION). > > The developers have played around with supporting USB 3G modems in the past. > > One of the problems is that these USB 3G modems are actually combo flash > drives (by default) and USB 3G modems, "flip flop" (multiple device), that > somehow the industry thought was a good idea. > > There is a Linux tool to switch "flip flop" (multiple device) USB gear called > "usb_modeswitch"... > http://www.draisberghof.de/usb_modeswitch/ > > but that has issues for us as well. It was decided this functionality was > not a good fit for AstLinux. > > The high price of 3G data, and poor quality (high latency) is another > negative. > > Lonnie > > > > On Jul 28, 2011, at 7:51 AM, Dmitry Komarov wrote: > >> Short investigation shows that >> >> CONFIG_USB_SERIAL_GENERIC=y >> >> should be set in the kernel. As I see there is no such option set in >> Astlinux kernel. >> >> Which is the simpliest way to get around this? Should I recompile the whole >> distro or kernel? >> >> Maybe this option should be included in Astlinux by default? >> >> --- >> Regards, >> Dmitry >> >> >> On Jul 28, 2011, at 15:15 , Dmitry Komarov wrote: >> >>> Hello! >>> >>> Has anyone tried to configure Astlinux to work with USB 3G modems? >>> >>> I have Huawei E220 HSDPA dongle which is fairly well supported in Linux, >>> but I still have problems to configure it under Astlinux. >>> >>> Does anyone have similar experience? >>> >>> --- >>> Best Regards, >>> Dmitry >>> ------------------------------------------------------------------------------ >>> Got Input? Slashdot Needs You. >>> Take our quick survey online. 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