Bell (Devices TAPI) Node doesn't work

Hey there, i tried to ring the bell of a phone using the “Bell” node. However I can’t get any connection to a modem. The right Pin of the Node is always red and I can’t choose my or any device. I am using an Eumex 401 and have installed the TAPI driver. The device is connected via USB. Maybe someone knows what I’m doing wrong. Thanks for your Help!