By default, the 'Calls' section (previously, Call History)  displays all calls made and received by your company, but it might be useful for you to only see calls that you answered, or calls of a certain type (for example, missed calls for which you want to call the contact back).
Your 'Calls' section can be filtered by ring group  and/or agent :
Filter by Ring Group
By clicking 'Showing All Ring Groups' , you can select the calls that are associated with a specific ring group. For example, if you want to select calls that belong to the “enterprise sales” ring group, you can use that Ring Group filter.
Filter by Agent
By clicking 'Showing All Agents' , you can select the calls that are associated with a particular agent. For example, to select the calls thatyou made and received you can use the Agents filter and select your name.