Re: [iaxmodem-users] 0.1.16 released

[Lee H. <fa...@ho...>]

Gert Doering wrote:

>Is there any news on 14.400 bps reception?
>  
>

The V.17 demodulator (the modulator works iffy, but better than the 
demodulator) is the big hangup, and that work hinges on Steve Underwood 
(spandsp).  I've been encouraging him for over a year now to get V.17 
working right, and that *is* on his radar, but for him it comes in 
priority after spandsp's T.38 support does... which has been a rather 
lengthy process, IMO.

I would be the first to admit that the missing V.17 support is the 
biggest drawback to both spandsp and iaxmodem... and there is nothing 
that I want more than to see adequate V.17 support there.  I know a few 
things about low-level V.17, but not nearly enough to fix the problems.

>I'm still following the advice "do not use it, it's not stable", but the
>speed improvement would indeed by noticeable...
>  
>

Yes, this is still true.  V.17 transmit may actually work well enough 
for some people, but not for me.  (So I recommend against using it.)  I 
think that you'll be lucky if V.17 receive works at all for you.  (I can 
fiddle with the spandsp code for a long time and eventually get a 
limited amount of function out of it, but not enough to seriously use it 
at all.)

Thanks,

Lee.