All phone calls are saved as a task. To make some special phone fields like call duration accessible for the user, they can be added to the task page layout.
Select: Setup > Customize > Activities > Task Page Layouts.
Add the fields:
•Call Type (inbound / outbound) - Salesforce standard field
•Call Start (date / time) - field automatically created during installation
•Call End (date / time) - field automatically created during installation
•Call Result Group (not available as default field)
•Call Result - Salesforce standard field
•Call Duration in seconds - Salesforce standard field
•Called ID - field automatically created during installation
•Caller ID - field automatically created during installation
•Call Ring Time (not available as default field)
•Call Hold Time (not available as default field)
•Call Duration (total) (not available as default field)
The default call duration is displayed in seconds. With a custom formula field you can display it in minutes.
Add additional fields
•Call Result in the activity history list
If you have task validation rules that would prevent to create the task, (e.g. if one field is left blank) then Placetel CTI für Salesforce® could not create the record. Change the task validation rule. Add a condition which indicates that the task was created manually: The field Call Type would be empty.