With this feature, one inbound call and it rings all phones, of course the first one to pick gets the call. You can also configure which phones goes to blast group.
Simultaneous Ring (Personal )- Simultaneous Ring enables users to have multiple phones ring simultaneously when any calls are received on their phone number, e.g. calls to a user’s desk phone could also ring the user’s mobile phone, in case the user is not at his desk. The first phone to be answered is connected.