depends on conference bridge being used, codecs, ad-hoc/meet-me, IOS version, etc
read the SRND media resources chapter to get more info on this or provide specific information on what you will use. in any case i strongly recommend you reading the SRND
most usual values
SW CFB default 4 (you can change it up to 48)
HW CFB detault 8 (depending on HW/platform/ios/codec/ad-hoc meet-me can be pushed to 32 )
there are also plenty of posts on the same matter you can look at using the search function within NetPro
HTH
java
if this helps, please rate
HTH
java
if this helps, please rate