Using SIP trunks, we can connect to your Private Branch System(PBX) and allow you to make and receive voice calls.
What you need:
A PBX server(on cloud or on premise).
How to set up the trunk:
You apply for a voice phone number.
We share a KYC document with you that you sign.
You pay for the phone number (see pricing: https://africastalking.com/pricing)
You share your trunk's(PBX) IP address for whitelisting.
Once we have whitelisted your IP address, you can go ahead and change your number's callback URL from your dashboard(voice -> phone Numbers -> actions -> ... -> callback url), basic format for the callback URL is trunk:trunk_ip_address eg: trunk:127.0.0.1
You can now set up your PBX and test.