apartment phone

Hi all, I was wondering if you can help me please. I recently moved into a new flat with a broken intercom which makes it impossible to get my deliveries, no buzz and no dial tone. I identified it as a "ACET 22220 (2 Wire)". It has 6 wires inside (yellow, green, white, red, blk, blue). Cables...

Hi I hope someone can please help me. The button on my entryphone has stopped working and won’t release the front door of the building anymore. I have checked with neighbours (there are 6 apartments in the building) and everyone else’s are working ok so it has to be a fault with the handset...