The Computer Telephony Integration Server (CTI Server) provides a socket level interface for integrating CTI Applications to Cisco Unified ICM and Contact Center Enterprise/Hosted. This interface is called the CTI Server Protocol (GED-188). The CTI Server makes call data available to applications in real-time. To accomplish this task, the CTI Server process responds to requests from clients and originates unsolicited messages. All messages share a common message header and use the same set of data types.
Although CTI Server provides a great deal of call event detail, be aware that the events reported and details provided with each call event vary depending upon the type of ACD involved and possibly the specific software version or other options configured. CTI Server Message Reference Guide (Protocol Version 16) for ICM Enterprise and Hosted Editions