Not sure how you would do this on Asterisk, but what I am doing with mine (billing by IP) is replacing the from header in the SIP INVITE with a pre-paid account number for the customer. You will need to load the UAC module for this, then do something like
 
if (src_ip=xxx.xxx.xxx.xxx)
{
  uac_replace_from("sip:PREPAIDACCTNO@foobar.com");
}
 
This means that any calls made inbound to OpenSER from that IP address will have the account number replaced with the pre-paid account number. How you do billing is then up to you - whether using the Acc module or whether something can be done on Asterisk, or even a third-party application. I have heard Asterisk can send DIDs. You can then do something similar for inbound DIDs from Asterisk.
 
Just beware this has some rather obvious security issues, so as a start, you can try having the customer add a prefix to their local account numbers which you can then authenticate against. If anyone knows of a better way, please don't hesitate to share.
 
 
 
On 9/22/06, ram <talk2ram@gmail.com> wrote:
Hi all
 
iam trying to deploy trusted IP and Accounting
so iam bit confused can some one clarify me how can i achive this
 
PSTN--OpenerSER(myserver)------------------Customer(Asterisk or ser or any predictive Dialers)---their clients
 
1.  how can i give access to the customer to call using his IP, and he can creat internal Number of users
2. how can i account to his IP address billing in Acc
3. how can i forward to DID from myserver to his server blindly
4. how can i bill that DID billing also, for incoming.
 
any suggestiong will be great
 
Ram

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