[Asterisk-Users] Extensions base policy

[Mohammad Salaque]

Dear List,

I am new in this world (Asterisk)  and facing a problem . i want to
make some group, base on extensions .so that certain extensions could
call to certain predefine number only.  let me give u all a short
example

extensions 1,2,3,4  will be group A ,  extensions 5,6 will be group B .

so group A only allowed to call one or certain predefine number but
group B could call anywhere.

could any one give me an example of that configuration ?

thanks
Salaque