On Tue, 2007-08-07 at 10:33 -0400, Jared Smith wrote:
> On Tue, 2007-08-07 at 19:22 +0500, Rizwan Hisham wrote:
> > try using codec gsm or g729
> 
> No, please don't.  I'll be the first do admit I don't know much about
> faxing, but I *do* know that you don't want to try to send faxes over a
> highly-compressed codec such as gsm or g.729.  It will probably only
> work over ulaw or alaw unless you're using something like T.38 (which
> uses udptl to transmit the fax data).
> 
> 
I have found that T38 (if properly supported) works quite well.

PaulH


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