A. The previous 30 days of calls (both incoming and outgoing) are logged to file %userprofile%\Local Settings\Application Data\Microsoft\Dialer\<username>_call_log.txt.

It can also be viewed by 'Call Log' from the View menu.

An example of an outgoing and incoming log is:

"Outgoing","6/7/2000","20:01","1:19","","titanic"<br>
"Incoming","6/7/2000","20:03","0:39","Administrator;titanic.savilltech.com",""