Dear: I was asked to carry out an installation of an intercom or video intercom. The truth is that I only installed an electric doorman only once and I denied a lot. The client asked me for suggestions to opt for a system, but before suggesting one I would like to know what differences there are between installing a doorman or video intercom. The gate opens with remote control so it is not necessary to install the latch. On the other hand, the distance between the gate where the panel with the camera and the telephone will be installed is 120 meters. I would be grateful if you can tell me which system you recommend for this distance, and what cables I should use in each of the systems to work properly. I also tell you that the cable to be used must go outdoors in a grabbed way to a wall, and another section of the buried route. I appreciate all the collaboration. Regards. PS: The client also asked me if there are Wi-Fi porters, but from what I saw for that distance it is very difficult ...