Welcome to our Community and thanks so much for your first post to our wall - we are sorry that you're having some issues making some outbound calls from your landline.
Do you (or the account holder?) subscribe to any Call Barring on your landline? You can check this via your online MyVirginMedia account or you can also follow the instructions within our Call Feature guide on how to check from your landline
Have you ever been able to call a mobile from your landline?
Pop back when you can with updates and we'll go from there 🙂