On Mon, Mar 14, 2011 at 3:22 PM, David Wafula <davidwaf@gmail.com> wrote:
Hi all,
I wish to include background  noise  in a conference where users are
calling in at 8000khz. What comfort-noise value would be recommended
for this?

Hard to say. I think your best bet would be to experiment and see what actually sounds good to you and your users.
-MC