RADIUS-based Services
                                            The device supports Remote Authentication Dial In User Service (RADIUS) by acting as a RADIUS client. You can use RADIUS for the following:
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | Authentication and authorization of management users (login username and password) to gain access to the device's management interface. | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | Accounting where the device sends accounting data of SIP calls as call detail records (CDR) to a RADIUS Accounting server (for third-party billing purposes). | 
                                            
                                            
                                                The device also supports the following user login authentication methods: