At 11:41 2/10/93 -0500, Murdering Thug wrote:

The best solution, as suggested by Miron is to use forward error correction. There is plenty of bandwidth in a 19.2/21.6/24.0/28.8 kbps connection to send CELP nybbles or bytes each along with their own ECC code.

But modern high speed modems already do quite a bit of FEC. I really don't think more is really necessary. As long as the decryptor and voice decoder automatically resynchronize after an error, there's no real problem with letting a few through. It's certainly preferable to adding long (or variable) delay. The sychronization problem seems to occur in "real" (government) secure phones too. They take a second or two to unmute following loss of clock synchronization. But not every bit error causes loss of clock synch; only a really bad line will do that. Phil