The COMtrexx Flex is a telecommunication system. The device connects various internal devices with various public telecommunication networks, thereby enabling external and internal calls. For this purpose, the COMtrexx Flex provides a number of different ports/interfaces. The COMtrexx Flex is structured modularly.

The COMtrexx Flex is a PBX with a 19" casing available for installation in a 19" rack. It is suitable for use in structured IT/telecommunication networks.

The device is intended for use in closed rooms. In addition, all of the devices permanently connected to the system must be located in the building.

Some of the functions require an additional hardware extension, a software expansion (activation), an activation at the network provider, and/or a configuration via the web interface.