[Asterisk-Users] Modem and Fax over VoIP

[Eduardo Goncalves]

On Mon, 06 Oct 2003 13:43:21 -0500
Steven Critchfield <critch at basesys.com> wrote:

> On Mon, 2003-10-06 at 10:12, Eduardo Goncalves wrote:
> > Hello,
> > 
> > 	I have the fowling scenario:
> > 
> > fxs[asterisk1]-----iax-----[asterisk2]e1----e&m---PSTN

> 
> If asterisk2 is your only access to the PSTN, then it doesn't make a lot
> of sense to do fax over VoIP. Put a couple of modems on asterisk2 with
> matching FXS ports and learn to use Hylafax. 

	I can't. Because asterisk1 is at a remote site. And the only access to PSTN at this remote site is trough asterisk2.

> performance out of the faxing and potentially lower bills. Also it is
> more flexible. Not to mention that the bandwidth over VoIP to make data
> quality calls is around 80k of VoIP to get flakey 9.6k. Do you need to
> waste 10x bandwidth for sub par functionality?  

	Is it possible to config asterisk1 to change to g.711 only when a fax transmission is detected?

Thanks
Eduardo