If your administrator has enabled Missed Call Logging in DialSource Settings, you can take advantage of seeing information pertaining to inbound calls which you have missed or not answered.
If you miss an inbound call (i.e. be offered an Inbound call but do not answer it), your History subtab will give you an indication of the number of calls which you have missed. The indicator will be in red. Click the number to dismiss it.
Clicking on the History sub-tab will allow you to view your missed "orphan" call for the Inbound phone number.
Clicking the Missed Call (in place of the record's name that would appear for a completed call) will take you to the logged Task for the missed call.
Task Logging for Missed Calls
*As with Missed Call Notifications, your Salesforce Admin will need to have Missed Call Logging enabled in order for you to use this feature.*
By clicking on the Missed Call in your History sub-tab, you can bring up and view the task created which represents your missed call.
For any missed call you receive (linked or otherwise), you will be able to return the call just by clicking the phone number within the history tab.
In the Standard package, if the number is Unknown (i.e., does not match a record in Salesforce), the task will include the number that called in the Comments.
In the Enterprise package, it will allow you to return all calls directly through Denali, including Unknown numbers by using the DialSource Action object.