That's a question for the company that handles your VoIP.
But I think that integrating VoIP with CRM on a computer can be called Computer Telephony Integration. And it seems you need a solution for that. Then I think CTI solution is the right term for what you're looking for.
Which industries have a need for this kind of software? I'm aware that sales people use this, just not sure if it's for everyone like small businesses and startups.
We're running a real estate company employing 35 sales agents. Can we integrate our VoIP with our CRM without a CTI solution?