My call is not going through

Solved
Hello,
I've been trying to call a friend since yesterday, but I can't reach him! I tried sending him texts, but I keep getting waiting messages in the messaging service! It's making me worry!
When I call, nothing! No voicemail, no tone!
Is there a problem with his line?

Thank you for your help.
Configuration: Windows Vista Internet Explorer 7.0

7 answers