Unable to connect on FaceTime

Question

sorry for my english but I'm italian, FaceTime when I call a cell phone does not connect, but when a phone call attempts to the Mac does not ring (osx lion), what can i do?

Answer 1

http://support.apple.com/kb/TS5419   -UPDATE
Pay attention to step 1:
If you started to have issues making or receiving FaceTime calls after April 16, 2014, you or your friend may have an expired device certificate. Updating both devices will resolve this issue.
iOS: Troubleshooting FaceTime
http://support.apple.com/kb/ts3367
If you encounter issues making or receiving FaceTime calls, follow these steps:
Update both devices (your device and your friend's device) to the latest version of iOS.
If you started to have issues making or receiving FaceTime calls after April 16, 2014, you or your friend may have an expired device certificate. Updating both devices will resolve this issue.
Verify that FaceTime is enabled in Settings > FaceTime.
If the issue persists or if you see the message "Waiting for Activation," turn FaceTime off and then on again. Learn what to do if you can't activate FaceTime.
If you don't see the FaceTime setting, make sure that Camera and FaceTime aren't disabled in Settings > General > Restrictions.
Verify that the date and time are set correctly: Tap Settings > General > Date & Time and turn on Set Automatically.
Verify that both parties have an active Internet connection and are connected to a Wi-Fi network or a cellular data connection.
Verify push functionality using Mail or other applications that use this feature. FaceTime uses push notifications to send and receive invitations.
Make sure that you have the correct phone number or email address.
Restart your device.
If using FaceTime over a Wi-Fi network, go to the steps to resolve Wi-Fi network issues.