Before hiring a professional, ask the potential installer the following questions:
. Have you installed a Video Intercom System before?
. If your system has CCTV cameras, inquire to the installers if they have any experience with CCTV cameras.
. If your system has an electric door lock, find out if the installers have any experience wiring electric door locks.
. Since the system must be checked after the installation is completed and some systems required programming, do not forget to ask the installers if they are including a test and programming as part of the job.