[lkml]   [2008]   [Aug]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: better support for EV-DO AC8700 800 M usbserial modem ??
On Mon, Aug 25, 2008 at 9:19 PM, Greg KH <> wrote:
> On Sun, Aug 24, 2008 at 09:41:33AM +0530, ctuxer wrote:
>> hi everyone ,
>> i have been using the EVDO AC8700 modem (usbserial) with kernel ,
>> it uses the 'option' module along with the generic usbserial module . Well
>> i am happy for the improved support for the modem handling in the new
>> kernels( like now i don have to modprobe with the vendor and product IDs )
>> , there is one point specific to this modem which is still not handled ,
>> ..... the modem switches between EVDO and CDMA mode when the signal
>> strength is low or when there is a bandwidth overload at the vendor's( the
>> service provider , bsnl in my case ) tower . This switch in the mode is
>> not recognised by the driver and the connection is lost once this switching
>> occurs . I have to restart the wvdial program to reconnect .
>> But if the modem were in CDMA mode when i connect , then the connection is
>> not lost when the modem switches back from CDMA to EVDO . I really don know
>> enough to understand what is the difference between the two cases or what
>> can be done to improve the support for this usbserial modem , ... can
>> anyone help ?
> This looks like something the userspace side has to handle, the option
> driver is just a dumb "pass-through" type driver, it doesn't really
> control the modem at all. The "control" channel on the modem allows
> this to happen, a userspace program drives this.
> good luck,
I am using the same EVDO modem, but using KPPP as dialer and using
option module(also tried airprime module after adding the vendor and
product ids ). I am not facing this. issue. Connection is fine when
switching occurs. I can see that whenever modem light turns from
GREEN(EVDO) to Orange(CDMA 1x RTT) or back , only the data rate is
changing but the conenction is fine. Please check with KPPP dialer and
enable the option "Auto reconnect".


 \ /
  Last update: 2008-08-25 18:27    [W:0.052 / U:9.068 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site