In order for Users to make calls they will need an IP phone. This could be a physical IP phone which sits on a desk, or a softphone which is loaded onto a mobile, tablet, or computer.
In order to allocate an IP Phone to a User there is a secure activation process. Once set-up, the user account is linked to the device. For a physical IP Phone we use a MAC address (this is a unique number which identifies that particular phone). For the BT Cloud Voice 'App' there is a username and password which is set up using the BT Cloud Voice portal.
You can only connect IP Phones from the BT Cloud Voice portfolio to your BT Cloud Voice service.