[Asterisk-Users] FAX, IAX and *....Maybe I'm dreaming...:-)

[Dan]

Hi,

----- Original Message ----- 
From: "Jim Flagg" <flaggj at comcast.net>
To: <asterisk-users at lists.digium.com>
Sent: Friday, December 12, 2003 4:54 PM
Subject: Re: [Asterisk-Users] FAX, IAX and *....Maybe I'm dreaming...:-)


> ----- Original Message ----- 
> From: "Dan" <dtoma at fx.ro>
> To: "Asterisk Users" <asterisk-users at lists.digium.com>
> Sent: Friday, December 12, 2003 8:25 AM
> Subject: [Asterisk-Users] FAX, IAX and *....Maybe I'm dreaming...:-)
>
>
> > It would be great if the IAX protocol will be able to tranfer fax data
(even
> > converted in another format) between Asterisk boxes, using low bandwidth
> > codecs like GSM.
> > I know that this is possible only with the G.711 now (passing faxes
using
> > the audio stream), but.... maybe in the future...some native support
will
> > permit this.
>
> Sounds like you are thinking of something like T.38.  T.38 is a FAX over
IP
> protocol but my guess is that there would be licensing issues using it
with
> Asterisk.
>
> It probably would not be that hard for someone to come up with a
completely
> open FAX over IP protocol.  A FAX over IP protocol would not have to
> operate in real time like VOIP.  You could actually use acknowledge
signals
> and retransmit packets that are dropped so that you get a perfect fax
> transmission. This can not be done with VOIP because by the time you
> realize you have missed a packet it is too late to re-transmit the packet.
> With FAX over IP it just means it takes a little longer to transmit the
page.
> You could also design the protocol so that you could transmit at whatever
> rate you wanted.  Slower links would use less bandwidth but take longer to
> send.

Exactly.
Mark, how about a ....FIAX protocol?..
:-))
Dan