[asterisk-dev] About chan_mobile

Tue Aug 11 15:03:21 CDT 2009

All of them got by sniffing trafiic between modem and Windows Huawei app.

I think Huawei E226 doesn't support voice commands... You can use it for sms send & receive.

Only E169 / K3520 models in spanish market support voice commands.

You can test it by sending it AT command: AT^CVOICE=?

If it answers something like ^cvoice=0 it has voice support. If it answers Command not suported, bad...

  ----- Original Message ----- 
  From: Carlos Ruiz Diaz 
  To: Asterisk Developers Mailing List 
  Sent: Tuesday, August 11, 2009 8:40 PM
  Subject: Re: [asterisk-dev] About chan_mobile

  I am about to test the channel with the model E226 by Huawei. I'll post the results whenever I finish the tests. 

  As you said, the AT commands for the modem manipulation are not standard and I am trying the understand them by reading your source code. If you have any documentation that you took as reference, I'll appreciate the download-link contribution :).

  On Tue, Aug 11, 2009 at 3:30 PM, Odicha <odicha at hotmail.com> wrote:

    If anyone has another hardware that could work and /or any question about
    how it works I'll be pleased to help.

    what it does at now...

    Huawei audio modems have three ttyUSB ports. So they use une port for
    GPRs/3G data connection ( subdevice 0), next port for audio (only audio
    slinear stream.. passtrough directly to asterisk when voice is enabled) and
    next port for AT communication (some no standard AT commands for enabling
    voice streaming on other port, and all rest of standard stuff)

    So It mainly uses AT commands and some routines for enabling/disabling audio
    stream. Not complex at all.

    The "worst part" in module is about modem detection. It might be rewritten.
    It searches for device strings in /sys/bus/usb/devices/ . It might work with
    some fs library I think

    How it starts.
    First of all It does the "dirty search" of modems. It will write into
    asterisk one file
    sebi_devices.conf
    with data about modems their tty port and their IMEI
    After that it loads sebi.conf. If Imei from modem config exists in
    sebi_devices.conf (it's attached ..) it loads modem channel.

    ----- Original Message -----
    From: "Thomas Kenyon" <digium at sanguinarius.co.uk>
    To: "Asterisk Developers Mailing List" <asterisk-dev at lists.digium.com>

    Sent: Tuesday, August 11, 2009 7:00 PM
    Subject: Re: [asterisk-dev] About chan_mobile

    > Odicha wrote:
    >> Hi.
    >>
    >> Take a look at something like that I have done.
    >> It's for Huawei voice usb modems
    >> It's in beta stage yet, for testing in 1.4.x branch
    >> It works fine on Huawei E169/K3520 modems (the only voice modems I own)
    >>
    > This sounds fantastic, a much better idea than my current chan_mobile
    > setup.
    >
    >> you have it at
    >> http://asterisk-es-rsp.irontec.com/svn/team/Odicha/unstable/chan_sebi/
    >>
    >> Now it supports voice and sms services (tested with 4 modems at time).
    >> It has early media working fine, CID detection and a good audio quality
    >> (no
    >> digital/analog conversion).
    >>
    >> ToDo.
    >> Sms support for standard serial devices (analog FCTs for example...).
    >> Better modem detection routines.
    >>
    >> Voice for standard mobiles not in mind because generally they don't
    >> support
    >> audio in serial/usb channel. So get audio through and audio card iy's a
    >> dirty solution and you can only have one channel at time.
    >> Using USB modems with voice capabilities the only limit is USB channel
    >> (in
    >> 2.0 not problem at all for working with 4 or 5 devices at time) (I don't
    >> have more modems for stress testing...). And they are inexpensive at now.
    >> It
    >> could be like "X100P" of mobile channels.
    >>
    >> Best Regards
    >>
    >> ----- Original Message -----
    >> From: "Kai Hoerner" <kai at ciphron.de>
    >> To: "Asterisk Developers Mailing List" <asterisk-dev at lists.digium.com>
    >> Sent: Tuesday, August 11, 2009 2:48 PM
    >> Subject: Re: [asterisk-dev] About chan_mobile
    >>
    >>
    >>> i think it would work. but your channel will conflict with chan_alsa /
    >>> chan_oss ..
    >>> chan_alsa uses mic + earphone connectors of the sound card connected.
    >>> the source code of this channel driver is a good starting point, if you
    >>> really intend to implement it this way.
    >>>
    >>> but your idea sounds kinda ugly.
    >>> why dont you use bluetooth?
    >>>
    >>>
    >>> Carlos Ruiz Diaz schrieb:
    >>>> Hello,
    >>>>
    >>>> I am about to start the development of a usb version of the
    >>>> chan_mobile. I almost finished my research and my idea is to use the
    >>>> USB serial connection to fully control the phone using AT commands
    >>>> (like chan_mobile). The main problem with this approach is the audio
    >>>> and by now, the only idea that I have is to use the headset (mic +
    >>>> earphone ) connected to the mic and speaker slots of the computer. I
    >>>> am also looking for a way to isolate the audio channels.
    >>>>
    >>>> Do you think it will work?
    >>>>
    >>>>
    >>>> ------------------------------------------------------------------------
    >>>>
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