Quakker:

The Quakker application is designed to handle telephone calls within the Salesforce system. It’s available on Appexchange.

It allows for receiving incoming calls and making outbound calls within Salesforce. Additionally, all conversations made through this application are recorded as activities and associated with a specific contact or account.

The solution is based on the Salesforce ecosystem. Therefore, for any difficulties related to basic functionalities, assistance can be found on www.trailhead.com (tutorials and instructions) or www.help.salesforce.com (technical documentation).