[Asterisk-Users] Voice Modem + Soundcard Driver

[Dan]

Hi Woody,

As it is a software modem, it can do full duplex.
.
> Also, I don't think Asterisk has drivers for this sort of thing,
> as most of the hardware is half-duplex.

When asterisk is started, I see something like this in the log:

[chan_modem_bestdata.so] => (BestData (Conexant V.90 Chipset) VoiceModem
Driver)
and
[chan_phone.so] => (Linux Telephony API Support)
  == Parsing '/etc/asterisk/phone.conf':   == Parsing
'/etc/asterisk/phone.conf'

Can those two be used for a voice modem?
There is a modem_bestdata.conf file somewhere?

Thanks,
Dan


----- Original Message ----- 
From: "Anthony Wood" <woody+asterisk at switchonline.com.au>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, June 04, 2003 2:09 AM
Subject: Re: [Asterisk-Users] Voice Modem + Soundcard Driver


> On Tue, Jun 03, 2003 at 11:09:28AM +0300, Dan wrote:
> > Hi,
> >
> > I have an USB voice modem which does not need to be connected to the
> > soundcard in order to build an answering machine.
> > It appear in the system as another sound card.
> > I have tested a free Answering machine application and it works great.
> > The modem is very cheap (paid around 25 USD for it) and has linux
drivers,
> > including the source files:
> > http://www.smlink.com/products/SmartUSB56.htm for description
> > and
> > http://www.smlink.com/download/Linux/slmdm-2.7.14.tar.gz
> > for the linux driver, including source files.
> >
> > Can this be used as a FXO interface for Asterisk?
>
> The key is can the modem do full-duplex voice (sound in both directions
> at the same time).  An answering machine is half-duplex:
> first, the sound is sent from the machine to the caller,
> then, the sound is sent from the caller to the machine.
>
> Also, I don't think Asterisk has drivers for this sort of thing,
> as most of the hardware is half-duplex.
>
> But I am only a newbie.
>
> cheers,
> Woody
>
> >
> > Best regards,
> > Dan
> >
> > ----- Original Message ----- 
> > From: "Mathew Frank" <mathewfrank at qushi.com>
> > To: <asterisk-users at lists.digium.com>
> > Sent: Tuesday, June 03, 2003 10:47 AM
> > Subject: Re: [Asterisk-Users] Voice Modem + Soundcard Driver
> >
> >
> > > > The problem with using Voice Modems is that they fall into two
> > categories:
> > > >
> > > > 1) Hardware Modems which only have half-duplex transmission of voice
> > > > 2) Soft/Win/Lin modems which are proprietry and don't have asterisk
> > > drivers
> > >
> > > or 3 - full duplex "real" voice modems such as produced by Banksia in
> > Sydney
> > > which have been available for years for IVR systems for which only a
> > > single-duplex channel is available in Asterisk.
> > >
> > > > 2 Phone lines
> > > > 2 Banksia Wave SP 336 Modems - these have 3.5mm female jacks for
> > > speaker/microphone
> > > > 1 Full Duplex Soundcard
> > > > 4 3.5mm mono male-male audio cables
> > > > 2 3.5mm stereo male -> 3.5mm female left + 3.5mm female right
adapters
> > > > 1 Linux Box with 2 serial ports and spare PCI slot for Full Duplex
sound
> > > card.
> > > > Asterisk
> > > > Programmer
> > >
> > > I had concidered such an approach, till I remembered the iNTRA modems
> > > mentioned above.   There is actually a question re legality of wiring
the
> > > sound card to the modem - or even audio-coupling to do the same
according
> > to
> > > the wording of the rules AFAIK.   Anyway I did concider your
suggestion
> > and
> > > when I posted it a year ago got in an argument with a fellow poster
who
> > > missed my point entirely till the point was lost.
> > >
> > > Mathew
...