Which service to choose?

Question

Telephony

in one service of outgoing calls, I connected a phone number, a bot calls there.
in case of a successful scenario, the service should redirect to the sip phone.
and here the question arises, which telephony (service) to choose, so as not to install software, but simply create cabinets for operators and they receive calls through the browser + so that they can embed this whole thing into their self-written CRM