railcam 1 - relais-verbinding-via-glas
   
 
 
directe verbinding   radio-contessa   webcam-contessa   railcam 1   railcam 2   laptop joop
relais-verbinding via glas   radio-contessa glas   webcam-contessa glas   railcam 1 glas   railcam 2 glas   laptop joop glas