In case of failing to access a database an error protocol will be written. You can display it by clicking on the icon in the taskbar with the right mouse button and selecting the option Error protocol or selecting the menu Extras - error protocol in the control centre.

 

The error protocol will be deleted with every start of CTI Data Connector salesforce.com Edition.

 

There is a log file for error tracking with the TAPI device driver - see configuration settings.