Integrate Intertechno Window Contact into OpenHAB

I want to integrate the following magnetic Window contact sensor into OpenHAB.

Intertechno Magnetic Switch ITM-100

To receive messages send by the sensor I use CUL transceiver from busware.

CUL 433

I already found addons needed to integrate transceiver with correct binding for intertechno devices:

CUL Transport
CUL Intertechno Binding

My openhab.cfg for configuring CUL looks like follows:

culintertechno:device=serial:/dev/ttyACM0
culintertechno:baudrate=38400
culintertechno:parity=NONE
culintertechno:data=8

Now I added an item to my item configuration addressing culintertechno configuration:

Contact Fenster1_Dach_Wohnzimmer “Fenster Links” (Dach_Wohnzimmer) { culintertechno=“type=raw;address=F0000FF0FF;commandOn=FF;commandOff=F0” }

However OpenHAB complains with following error:

org.openhab.model.item.binding.BindingConfigParseException: item ‘Fenster1_Dach_Wohnzimmer’ is of type ‘ContactItem’, only SwitchItems are allowed - please check your *.items configuration

So my question is now how I configure my window contact sensor as contact correctly or is this not possible with the CUL transport?

I think I can answer the question myself. It looks like that receiving of signals is not supported by CUL Intertechno Binding for now as you can read here:

I solved this issue by buing window contact from Homematic.