How to use schedule calls??

How to use schedule calls??

Even the overdue sheduled calls are automatic closed after de date/time due?!

Am I missing something here?

Trying to edit those scheduled calls I can not change it status or call duration??!

It is basic on a CRM system schedule, postpone, confirm scheduled phone calls.

Can anyone explaing how it was suppost to work?!

Sory about my poor english.

Fred