asterisk users - Jan 2011 - progressinband, how much extra CPU load?

Hi everyone,

We have an Asterisk 1.4.17 user who has problems with sometimes not getting
a ring tone on the calling phone.

We're considering setting progressinband = yes, but would like to know how
much extra CPU load this will require? If anyone can give something even
roughly specific (eg "30% increase") that would be great, rather than
just
"lots".

Also, are there any ATAs which are known to not work with progressinband yes? We
have Polycom, Linksys and Audiocode.

Thanks for any advice,

-- 
David Cunningham, Voisonics
http://voisonics.com/
US toll-free: +1 888 842 2720
UK: +44 (0) 20 3298 1642
Australia: +61 (0) 2 8063 9019
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