Presence and IntComm WG

[Jeremy George <>]

  Thanks, Xiaotao.  This is useful information for the helpdesk.  My
laptop dual-boots and SIPc works exactly as expected on the MS side.
So, it's not a hardware issue.

  I'll see if I can find out how to re-configure the DMA channels, but
clearly RH has an issue here.  Anybody else use RH and know how to
configure DMA channels correctly?

- Jeremy


On Tue, 9 Sep 2003, Xiaotao Wu wrote:

> Date: Tue, 9 Sep 2003 21:57:49 -0400 (EDT)
> From: Xiaotao Wu 
> <>
> To: Jeremy George 
> <>
> Subject: Re: [WG-PIC:61] sipc
> 
> Based on RAT FAQ:
> http://www-mice.cs.ucl.ac.uk/multimedia/software/rat/faq.html
> 
> Why doesn't RAT recognize my soundcard?
> RAT 3.2.0 and later require a full duplex soundcard (i.e. one able to
> record and playback simultaneously) and will not function with older,
> half-duplex, cards. The single most common reason why RAT will not detect
> your soundcard is because the card either does not support full duplex, or
> is misconfigured.
> 
> If you are using PC hardware, you should check that the DMA channels are
> configured correctly. This is a common error on Linux, since the RedHat
> sndconfig program can report a working configuration, even if these are
> set up wrongly.
> 
> Note also that being able to play CDs or MP3 files on the machine is not
> an indication that your sound card is configured correctly for rat.
> Playing out audio is a half-duplex operation, rat requires that your card
> runs in full duplex mode.
> 
> If versions of rat prior to 3.2.0 work on your machine, but later versions
> do not, it is likely that you have a half-duplex soundcard. Older versions
> of rat will work with these cards - but we do not support them now.
> 
> RAT doesn't work with my ESS Maestro card on Linux!
> Some versions of the Linux driver for the ESS Maestro 2E card have bugs
> which prevent them from working with rat. You need to use v0.14 of the
> maestro driver (linux 2.2.16) or above.
> 
> 
> 
> -Xiaotao
> 
> ===========================================================
> Name      : Xiaotao Wu
> Email     : 
> ,
>  
> 
> Homepage  : http://www.cs.columbia.edu/~xiaotaow
> Phone     : (212)939-7054,  Fax: (801)751-0217
> Phone-PC  : (212)939-7133
> SIP       : 
> sip:
> Office    : Room 506, Mudd building, West 120th
> ===========================================================
> 
> On Tue, 9 Sep 2003, Jeremy George wrote:
> 
> >   That's it.  Rat doesn't see the sound card.  The hardwardware browser
> > lists it as 82801CA/CAM AC'97 Audio.  The driver is Intel i810_audio.
> > /etc/modules.conf has this line: alias sound-slot-0 i810_audio.
> >
> >   Is there a rat configuration file I can point to the card?
> >
> > - Jeremy
> >
> > On Tue, 9 Sep 2003, Xiaotao Wu wrote:
> >
> > > Date: Tue, 9 Sep 2003 17:06:28 -0400 (EDT)
> > > From: Xiaotao Wu 
> > > <>
> > > To: Jeremy George 
> > > <>
> > > Subject: Re: [WG-PIC:61] sipc
> > >
> > > Could you please try to get rat from
> > >
> > > http://www.cs.columbia.edu/~xiaotaow/tmp1824/rat4220.tar.gz
> > >
> > > and run 'rat', to start rat with GUI. Then click on the 'Options' 
> > > button,
> > > in the 'Category', choose 'Audio', and check whether rat can find your
> > > audio device or not.
> > >
> > > rat can also be got from
> > > http://www-mice.cs.ucl.ac.uk/multimedia/software/rat/download.html
> > >
> > > If possible, could you please get the RTP packets you got and send to 
> > > me?
> > >
> > > Thank you!
> > >
> > >
> > > -Xiaotao
> > >
> > > ===========================================================
> > > Name      : Xiaotao Wu
> > > Email     : 
> > > ,
> > >  
> > > 
> > > Homepage  : http://www.cs.columbia.edu/~xiaotaow
> > > Phone     : (212)939-7054,  Fax: (801)751-0217
> > > Phone-PC  : (212)939-7133
> > > SIP       : 
> > > sip:
> > > Office    : Room 506, Mudd building, West 120th
> > > ===========================================================
> > >
> > > On Tue, 9 Sep 2003, Jeremy George wrote:
> > >
> > > >
> > > > Anyone who has sipc working,
> > > >
> > > >   I downloaded the linux version of sipc.  After some futzing around
> > > > I got sipc to register with my local SER.  Signalling appears to work
> > > > as expected.  Ngrep shows that media is be exchanged as expected.
> > > >
> > > >   Everything works except there's no sound.
> > > >
> > > >   I haven't configured anything under preferences->media.  It reads
> > > > 'ratmedia %{host}/%[localport}/%{port}'  Is that right or do I need to
> > > > fill in values?  If so, what should they be?
> > > >
> > > >   Thanks.
> > > >
> > > > - Jeremy
> > > >
> > > > --
> > > >
> > > >
> > >
> >
> > --
> >
> 

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