[Asterisk-Users] low bandwidth?

[Roy Sigurd Karlsbakk]

hi

http://voip-info.org/tiki-index.php?page=Low%20Bandwidth%20VOIP tells 
me it's possible to do <= 10kbps (or that someone thinks so), although 
http://voip-info.org/tiki-index.php?page=Bandwidth%20consumption tells 
me the lowest possible would be G.723.1 at 5.3kbps, resulting in a 
total of 20.8kbps including IP overhead, and the a little more if 
running RTP.

What would you suggest to do to save as much bandwidth as possible, 
while keeping the quality at a "respectable" level?

thanks

roy