- Download and install Opensips;
- Create template configuration for Customer (originator) and Vendor (destination);
- Customize origination peer to analyze incoming destination number and identify destination number area code;
- Based on identified area code, search randomly for a number in a specific file for a number to replace at FROM field (caller ID);
- Send call to destination;
Hello, i am working with opensips many years. send me some examples of call diagram your want to realize in chat. be free to ask me any question. bye, Pavel.