-----BEGIN PGP SIGNED MESSAGE----- rishab@dxm.ernet.in once said: RI> Eric Hughes wrote: RI> > the great voice-over-data protocols and products introduced by RI> > Intel, Rockwell, ZyXEL and others at Comdex which will make RI> > Voice-PGP so much easier RI> > RI> > As I understand these voice-over-data products, the voice goes over RI> > analog, added to the modem signal. The modem signal is interpreted, RI> > and then reconstructed and subtracted from the incoming signal, RI> > leaving voice. Very clever, but insufficient for secure phones. RI> RI> I don't think that's how they do it. As far as I know, most methods RI> multiplex RI> digitized audio with the data. One system used by some people in India RI> provides RI> a dynamic combination of fax, (digitized) voice and data, depending on the RI> throughput - eg vox/9.6 data if 14.4kbps, fax as well if 19.2, etc. RI> RI> While Intel and others are proposing standards, ZyXEL does it with software RI> along with a voice card or possibly RJ11 input. A friend of mine saw a demo RI> of it at Comdex, on an old 1496E (16.8 kbps zyxel to zyxel). The new v.34 RI> does RI> 28.8k - lots of room for clear digitized voice and high speed data. RI> RI> This is exactly why I thought it would make secure voice easier, if not RI> secure RI> phones (who wants to lug a modem and PC around as a 'handset'?). RI> RI> I'll be testing some Onetics Rad VFAST modems this week, which apparently do RI> digitized voice over v.34 as well.
You wouldn't have the directory name as well, by any chance?, David.
The IGP files are available at a32.cc.umist.ac.uk in the /network/ftp/igp directory. There are two versions of the program available: 1. igp8_10x.zip for 8 bit sound (on 8 or 16 bit sound cards) 2. ig16_10x.zip for 16 bit sound cards. Better quality, but more data to transfer so a bit slower. the latest source code is also available as igps_10x.zip. Paul Archard (IGP UMIST Distribution acting Project Manager) _______________________________________________________________________________ kafka@desert.xs4all.nl Cryptoanarchy, MDMA, Tekkkno, SL-1200 <blink> Kafka's home page _______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: 2.6 iQBVAwUBLt7CDZRymF15lPcFAQFSsgIAhoPpWCNjRbmqu9hxrrzSKbf7uMqeJxAd /B24tG5b5Cn3a478sg3OrMUjgF9CbsS7FZZEtKL8beOcsxS/5oaoEw== =jMOd -----END PGP SIGNATURE-----