The modem is part of an EdgeProcessingUnit (EPU). The EPU is automatically put into operation, the only manual procedure that has to be done is to update modem firmware and apply configuration (restore backup) by the WebUI.
My goal is to find a way how to setup the modem automatically - To do so a communication path (e.g. SSH) needs to be open in the delivery state. If I have to activate the communication path, I can also stay with the previous procedure.