| Linux | CenOS 6 | CentOS 7 | |
| Asterisk | 11.x | 13.x | |
| Management system | FreePBX | CompletePBX | |
| Available on Xorcom Hardware |  | | |
| Available as Virtual Machine | | | The new VM capability opens up new ways to implement VoIP phone systems including in hosted in internal virtualization environments. |
| Class of Service | | | Advanced and granular management of extension permissions. Provides control and security to the VoIP PBX. |
| Authorization Code | | | User may change an extension’s Class of Service for a specific call by dialing their authorization code. |
| Remote Substitution | | | Allows user to use any phone as the user’s extension for one phone call |
| Cross-system search | | | Trunks, extensions, features, users, conference rooms and many other aspects of the phone system are easily searchable. |
| Responsive interface | | | CompletePBX VoIP phone systems may be easily managed from any device. |
| Hot Desking | Limited | | SIP and analog phones may be used in Hot Desking environment. |
| Multiple Devices per User | Limited | | Each extension may have unlimited devices - VoIP, analog, deskphones and shoftphones associated with it. |
| Pickup Group Management | Limited | | In v.4.x there was no group view/management, only per extensions |
| Coherent Interface | Limited | | v.5 provides the same logic and look & feel throughout all the management and user portal dialogs. |
| Multi-Tab Interface | | | |
| Single Sign-On | | | Different apps required separate login (Switchboard, reports etc). |
| Extensions Status View | | | Allows viewing and controlling all diversions from a single view |
| Boss/Secretary | | | |
| Personal Time Group | | | Allows user to define call diversions (call forward, boss/secretary, do-not-disturbe etc.) based on personal or global time conditions |
| Lock/Unlock Phone | | | |
| Customer Code | | | Allows user to designate a customer code to a specific call for tracking purposes. Call detail reports may be filtered by Customer Code, allowing, for example, billing of customer for time spent with them on the phone. |
| TwinStar - High Availability PBX | | | |
| Complete Concierge - Hotel PBX | | | Hotel PMS integration for CompletePBX phone systems. |
| CompleteSBC - Session Border Controller | | Currently not supported | Supported via a separate device |
