VoIP billing sytem (Radius server) help needed?

[sanzeeb]

hi

we want to develop a VoIP billing software where pepole can buy their

credit through online and call over IP, i am not concern about the

backend server(router ,getway etc) ,paypal or anything else. what i

need to know ,how can i found the login status ,logout status and when

the credit is over the line will disconnected? through out the net i

came to know the billing part is dependent to a server called "Radius

server" but i havent found much how to collect information from radius

server or inform about the status to radius server through php script.

 

what i have found is:

http://php.net/radius

and

http://pear.php.net/package/Auth_RADIUS/docs/1.0.2/Auth_RADIUS/_Auth_RADIUS-1.0.\

2_examples_radius-auth_php.html

 

 

but there is nothing in details about php and radius server relation

or something like that.only functions are there, and the condition is

i have to install the BSD radius server.

 

my question is how to access in general Radius server ?

(my concept might wrong, if it is then please give me the right

thought and solution).

 

thanking you

[sanzeeb]

anyone have some or any suggestion to solve it?