Hi papiya123,
Thanks for coming to Apple Support Communities for help with FaceTime on your iPad today. It sounds like you have dropped calls.
Check out this page for steps that may help: If you can't make a FaceTime call on your iPhone, iPad, or iPod touch.
"If you have connection or sound quality issues with FaceTime
If your cellular connection or Wi-Fi network are running slow, or other users are streaming audio or video on the same Wi-Fi network, you might have these issues:
- Connection alerts or unable to connect
- Choppy video calls
- Black screen
- Dropped calls
Make sure that both you and the person that you're calling are using a fast Wi-Fi or cellular connection. If you’re using Wi-Fi, FaceTime requires a broadband connection."
Do you have any other devices you can test FaceTime with on your network? Have you restarted the router?
A good isolating step would be testing FaceTime on another network too.
Have a fantastic day!