Depending on the type and age of your telecommunications system, you can cost-effectively retrofit it or exchange it for one of our certified communication systems.
| Type of system | Release status | Upgrade possible? | What is required? | Chargeable? | Devices |
| Alcatel 4200 | All releases | No | New IP-enabled system (OXO Connect R3) | Yes | Must be exchanged |
| OmniPCX Office (RCE) | All releases | Yes, to OXO Connect R3 | Software upgrade and CPU exchange (if applicable) | Yes | Can be maintained in migration |
| OXO Connect | Release 2 | Yes, to OXO Connect R3 | Software update | No | Can be maintained |
| OXO Connect | Release 3 | Latest release, no refitting necessary | Latest firmware | No | Can be maintained |
| Alcatel A4400 | All releases | No | Migration to OmniPCX Enterprise or OpenTouch™ Business Edition and use of an OpenTouch™ Session Boarder Controller | Yes | Can be maintained |
| Business Integrated Communication Solution (BICS) | All releases | No | Migration to OpenTouch™ Business Edition and use of an OpenTouch™ Session Boarder Controller | Yes | Can be maintained |
| OmniPCX Enterprise (OXE) | Until 12.1 | Yes | Software upgrade and use of an OpenTouch™ Session Boarder Controller | Yes | Can be maintained |
| OmniPCX Enterprise (OXE) | From 12.2 onwards | Yes | Use of an OpenTouch™ Session Boarder Controller | Yes | Can be maintained |
| OpenTouch™ Business Edition (OTBE) | Until 2.3 | Yes | Software upgrade and use of an OpenTouch™ Session Boarder Controller | Yes | Can be maintained |
| OpenTouch™ Business Edition (OTBE) | From 2.3.1 onwards | Yes | Use of an OpenTouch™ Session Boarder Controller | Yes | Can be maintained |
