Telephony Integration. The linking of the computer in the ACD system to the computer which houses the companys database to permit faster and more efficient handling of calls. Screen pop is a function of CTI which can direct the data screen of the calling persons account to the terminal of the agent as the call is being routed there, saving the agent from having to identify the callers account number, key it in, and wait for computer response. Also permits transfer of data screens to a second agent when a call is transferred and many other capabilities impossible with only one or the other system independently.