This isn't going to be a helpful answer but...
In America, standard phone wire is red + green + yellow + black. The service typically comes down red +green, with the other two being for redundancy or extra service.
Cat 3 (I think), cat 5 and cat5e use twisted pairs of white/orange + orange/white etc etc.
To hook up the phone, activate the service, then just find which two wires have a voltage across them - either
- try an old telephone and listen for a dial tone
- check with a meter
- check with a phone line tester
It can't be too much different from that I would have thought and I think it runs at a bout 60v over here, bt with very low current.