Phone plugged in and has dual tone BUT WHEN CALLED DONT RING AND GORS TO VOICEMAIL

[Mr+peed+off]

Phone is plugged in and has dial tone. WHEN CALLED DONT RING AND GOES TO VOICEMAIL

[Mark39]

Looks like you have a fault that you'll need to report to Sky.  Try the connection test here, regardless of whether or not your broadband is working ok. If  a fault is detected you may be able to book an engineer there and then.  If not and you are still able to make calls give sky a ring to report it on 150.

https://www.sky.com/help/home/sky-talk/fix-problems-with-my-phone/articles/fix-phone-problems-start