Redial or call back an extension when that extension is

Hi,

I want asterisk to redial an extension , when that extension is busy.

i explain my problem with an example,

I have an extension 1010, i dial another extension 1011. But the person who has 1011 extension is on the phone , i can not reach that person so i want my system to make authomatic redial when that extension is not busy.

How can i overcome about this problem?

if someone help me, i will be pleased

Regards,

HI, Have you found a way to do this?