Click to Call is a feature which give agents the ability to directly call a participant through CRM tool by clicking on the contact information. This is platform feature and can be initiated with any CRM tool which is integrated with Softphone. For reference, we are currently using it with Salesforce.
There are following USE CASES to it:
Agent Clicks Phone Number in CRM tool and Softphone will pop up and immediately start dialing the outbound number with the only present Caller ID for that country code.
Agent clicks phone number in CRM tool and Softphone with Point of Sale, Country Code, Caller ID and Call Recording feature set pops. There are multiple Caller IDs assigned to that country so the agent will see a short list of the Caller IDs that can be used for that country code. Call button is active after one of the Caller ID is selected.