What is CTI (Computer Telephony Integration) Systems ?

Computer Telephony Integration (CTI) system is a technology that allows telephone systems and computers to affect and trigger each other.
So a computer telephony integration system, or a CTI system enables computer systems and telephony systems to talk to each other. CTI combines these two digital systems, coputer and telephone systems to each other.
So as a software programmer, developers can create applications that can make calls and handle these in-bound and out-bound calls. Especially CTI (Computer Telephony Integration) is an essential instrumentation in call centers. CTI software minimizes call center agent response time and increases the call center systems.