I had to drill any new holes. Cables were all there and then it was time to connect. For sample I wanted to implement an operation without a / b port. This did not succeed, only with an a / b connection has everything working as it should. Configuration was easy for our needs and now we can all Telfonen the doorstep speaking and possibly opening the door. For power supply I use the still existing bell transformer, so only a small drop in brightness by the use of the system is visible in the dark. The configuration is easy to read the appropriate chapter in the manual.
The system itself works for weeks without further complication and looks good. That's good with the film masters for the bell buttons to quickly obtain a label. With a little skill but can be quickly bring a Office or image editing program's design as a label.
