Conference with more than 20 Milli sec

Dear all,

I want to know if I could configure the conference server to use more than 20 Milli seconds.

Right now when I use conference, I can send more than 20 Milli seconds of voice data like 40 or 80 Milli seconds. But I get only 20 Milli seconds of voice data from the conference server. Is it possible to change the server to send me more than 20 Milli sec may be 80 Milli sec or more. I want to use g711 and gsm.

Thanks for your advice,
Regards,
Nanda Kumar G.