Architecture Diagram 

Salesforce connector solution makes use of Open CTI API to integrate Cisco Finesse CTI with Salesforce call center. In order to communicate with Cisco Finesse, the solution makes use of Cisco Ajax XMPP Library. In order to establish a connection with finesse, the Cisco Ajax XMPP library uses port 7443 for Https connection and 7442 for HTTP connection.

Diagram Reference: https://app.diagrams.net/#G1HNgJOCMxmMMhIwtTuDSrg_9E90juc99J