Hi Apparently the phone part that was left on the wall would be Xena brand What you have to do is paste a piece of paper with letters to each cable that tells you, yes? It is very important to follow the step by step and I will guide you, eye that does not mean that it will work the lines may be cut, but we will try. Let's see: 1 ° In the middle, just above what it would be where the housing screw is screwed (missing) there are two green and red wires together connected with a white one, to the white one put PM (midpoint) 2 ° Above there are two contacts, the one on the left green connected from above with a yellow to that yellow put RT (telephone receiver) 3 ° To the side there is another contact with a yellow cable with terminal and above another yellow to that put MT (telephone microphone). That would be communication When you have done, let me know and we will continue ..... If something you did not understand Greetings To know what you understood and are there edit your query with the pencil symbol, after the dotted line we continue -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- ------------------------------------------------- Part 2 We continue: Where is the buzzer (bell) there are two screws; the one on the right has two wires (yellow and white, to that mark as AZ (buzzer power) and the other (white only) mark it as LL (called) I don't see that it has a lock line, so that will remain unconnected. Now that you have everything marked (I hope) we start with the Garin connection. THAT YOU DON'T MISS THE BRANDS BECAUSE IT WILL BE IMPOSSIBLE TO LOCATE THEM FROM HERE. Be careful not to touch the tips of the stripped wires, disconnect everything marked and mount the new phone (Garins T02) 1 ° You connect the cable marked PM to terminal 6 that says TR (transmitter - receiver). 2 ° You connect the cable marked with RT to terminal 2 (R) At this point you could, before connecting, support the cable in the terminal and with the handset in your ear you should listen to the noise of the street, If so, you can connect it, if, on the other hand, you only hear a Tac, it could be that the cables are inverted, then test (in the same way with the cable marked with MT.) THE ONLY TWO CABLES THAT COULD BE INVESTED ARE RT and MT (do you understand no?) and the cable marked MT connect it to terminal 5 (T) If everything goes well you would already have audio (communication to the street) If you do not hear any noise it is very likely that the technician who maintains the building has left the lines disconnected in the passage box (you will have to resort to it) Suppose everything is fine. 3 ° The two wires marked AZ connect them to terminal 14 of the Garins 4 ° The cable marked with LL is connected to terminal 15 With this you would have the bell working. More than this from here I can not do, I hope it works and if you were so kind comment if it was so. Greetings and have a good weekend -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- - Clarification for similar situations: 1 ° When an electric doorman breaks, it puts the entire system in a short circuit, be it a building or a private house. 2 ° If this is maintained over time, there are components that burn and must be replaced. 3 ° In the case of departments that are unoccupied, the technician who does the maintenance or repair usually finds itself in need of disconnecting said device or at least the lines that feed the telephone in question. 4 ° Therefore it is very common that these remote connections do not work. 5 ° To not worry that the lines are correctly connected as long as they are enabled. Clarified this, I hope that is not the case and that it is working properly.