Hi, ----- Original Message ----- From: "Jim Flagg" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, December 12, 2003 4:54 PM Subject: Re: [Asterisk-Users] FAX, IAX and *....Maybe I'm dreaming...:-)
> ----- Original Message ----- > From: "Dan" <[EMAIL PROTECTED]> > To: "Asterisk Users" <[EMAIL PROTECTED]> > 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 _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users