With ABB-Welcome you are free to choose different system interlinkage types to fit the requirements of various buildings. For any system, there are 2 kinds of connections to handle the distribution of devices. One structure is the “loop” connection (1) which means to install all devices one after another. This way you are able to implement more than one indoor station in parallel in a very simple way.
Using the “branch” connection (2), it is very comfortable to install door communication devices for multi floor buildings. The most important advantage is the stable connection of all devices if one device drops out. For projects with diverse requirements you can merge branch and loop connections (3).