Below you will find a number of action points and tips to use to investigate your system and to detect any possible errors.

The video kit can be expanded maximally with:

The audio kit can be expanded maximally with:

Yes, You add a telephone interface and a telephone exchange to the access control installation. The one side of the interface is connected with a, b and P terminals from the installation while the other side (a, b) is connected to an analogue internal line of the telephone exchange.

There is an extra bell in the Niko Access Control range:

The video signal of the Niko Access Control installation is a symmetrical line signal (1 VPP 100 Ω), while a non-symmetrical coax signal (1 VPP 75 Ω) is the most common standard video signal.