Nick Hill escribio': > Hello Sasa > > The page you point to doesn't talk about USB connectivity for chan_mobile. It > does talk about bluetooth connectivity, which can be achieved by way of a USB > bluetooth dongle, but that is not the same thing. > > I am talking about using standard interfaces exposed by mobile devices > (mobile > phones or USB dongles), exposed via USB, to establish voice calls as an > extension to asterisk. And examining whether the standard CDC modem interface > or > any other standard interface generally carries the required commands. > > There are several potential benefits to using the USB approach: > 1) Devices will be immune to interference from other 2.4Ghz devices. > Bluetooth > is prone. > 2) Potentially better call quality. Using bluetooth, the call will need to be > converted from the VOIP codec, to PCM then to the bluetooth codec then to the > over-the-air mobile codec (GSM), with associated latency. There may be a > possibility of cutting one of these conversions. > 3) This could be used with a USB data dongle interface, which are cheap, > relatively simple, and are powered from the USB port. They also generally > offer > great sensitivity over the air. > 4) The bluetooth approach is dependent on a working (bug-free) bluetooth > stack, > with specific hardware, which may or may not be available. > 5) less software and hardware needed in the chain, so potentially more > maintainable and reliable. > > > The bluetooth approach has some advantages: > 1) The bluetooth interface is standardised and any device should > theoretically > work with any other of the given generation. The required codecs, for > example, > are well defined. (in practice, this isn't the case - for example, the Nokia > E65 > is bluetooth capable and doesn't work, and the chan_mobile is fussy about > which > bluetooth dongles you use). > 2) Even if the USB interface does provide necessary interfaces for voice > telephony, they may not be well tested. (buggy). We don't know - but then, > the > bluetooth approach is, in practice, hardware dependent also. > 3) Bluetooth dongles are "swallowed" by a mobile phone. One dongle needed for > each phone/channel. (they are cheap, but may have other ramifications). > > Someone may have investigated the USB approach already and discounted it. Or > if > not, it may be worth further examination. > > Carlos indicates that USB support may be available in chan_mobile but I can't > find any references to it, and I think Oliver is looking for more info as > well. > > > > > > Sasa Bobek wrote: > >> Just google/bing it. http://voip-info.org/wiki/view/chan_mobile >> >> On Thu, Jul 9, 2009 at 12:56 PM, Olivier <[email protected] >> <mailto:[email protected]>> wrote: >> >> >> 2009/7/2 Carlos Ruiz Diaz <[email protected] >> <mailto:[email protected]>> >> >> Check chan_mobile. Now is mature enough to be used in a server >> with low CPS. >> The USB connectivity will be introduced in the close future (I >> think) but by now it can be connected via bluetooth device. >> >> Where did you get this info (USB connectivity for chan_mobile) ? >> Is there a way to learn a bit more ? >> >> _______________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > There are some links about a module called chan_sebi that can use some Huawei USB dongles as a voice interface (in Spanish):
http://odicha.wordpress.com/2009/06/30/chan_sebi-1-que-como-y-por-que/ http://odicha.wordpress.com/2009/06/30/chan_sebi-2-trasteando-con-el-codigo/ -- perl -e '$x=2.3;printf("%.0f + %.0f = %.0f\n",$x,$x,$x+$x);' _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
