if i have this setup:<br><br>[sip users] -- [asterisk] --- [as5300] --- [pstn]<br><br>asterisk will talk to as5300 using sip. i will use as5300 as a trunk on the asterisk so sip users can call out to pstn.<br><br>what i would like to is do prepaid on those trunks, not on the sip users. sip users can call any other sip users . i want to do it that way coz i'm trying to build a multi-tenant pbx, and i will use the trunk as a unique identifier for each customer not their local extension.<br><br>e.g. customer A will have trunk 34587612 and will have extension 101 and 102, customer B will have a different trunk 87659043 but will also have the extension 101 and 102.<br><br>i want to create a billing system to monitor only the trunks and also to load amounts on those trunks. is this possible? will i be able to use app_prepaid for this?<br><br>thank you.<br>regards,<br>nhadie<br><br><br><br><p> 
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