I have query regards integration of prepaid calling card in opensips
1. Opensips, Asterisk and A2Billing can be used to establish prepaid Calling card feature?
2. If possible, I want to use Asterisk for PSTN call and opensips for Sip call, the call detail for PSTN and Sip will be update in A2Billing.
If you have any other idea, to integrate Calling card feature in Opensips, please suggest me.
OpenSIPs (via the dialog or call_control module) can do prepaid like services - it can monitor the call and interrupt the call in the middle, but you need an external billing application to do the rating.