CTI Data Connector for Salesforce® can be used for all Cloud PBX systems which are either based on Broadsoft platform or Cisco Webex Teams.
Broadsoft is used by a lot of carriers like German Telecom, Swisscom. Check with your cloud PBX vendor.
Cisco Webex Calling is a cloud offering by Cisco. In Germany it is offered by Placetel.
NetSapiens
Cloud PBX based on NetSapiens
•Go Integrator client application with CRM license. Must be obtained from the cloud PBX vendor
•Windows