[quote=Greg530;47921]1. get a phone, try to plug it in see if it works
2. ask the project manager of the construction
3. or ask the landlord
4. Walk around the house (outside your apartment) to find a telephone cabinet/box. This is where all lines merge. Hope there is a sticker on the wires with the phone number.
Thats actually
not legal !!
Swisscom keeps a record of which wire goes to which flat in a block of flats, (so that if you give the name of the previous occupant they send the new line striaght to you). As an electrician, we have to send a list of which cables we have moved in the main junction box back to swisscom after every connection we do.