As some of you might already have guessed I am doing electrical stuff in my employment, including electrical engineering. For this purpose our company utilised Eplan Electrical P8. Other examples for such an engineering software would be Elcad, AutoCAD Electrical or WSCAD and some more. Just Google for it if you want further information.
Eplan using USB dongles to protect their software from piracy. The dongle has to be connected to your computer in order to start the software and keep it running. Removing the dongle causing the software to stop working until you either reconnect the dongle or close it.
If you want to use Eplan on another PC you have to hand over your dongle. This is quite impractical especially if your company has multiple workstations in different places but does not want to invest in more of these quite expensive Eplan licenses.
The solution for this issue is buying a so called network license. You still will receive a dongle which has to be connected to any PC which later will serve as license server. Eplan utilizing DCOM services to achieve this.