For an old building I'd forget about convincing others to chip in for a proper solution. No management + old building, just DIY something for yourself and chances are no one will care.
I can think of a few options:
- if the staircase is a circular staircase, such that there's a near-uninterrupted path between the door and outside your doorbell, try a generic wireless doorbell and place the receiver outside your apartment front door
- is your apartment window on the same side of the building as your front door? If so can get a generic wireless doorbell set, put the receiver outside your window/balcony above the doorbell (so it doesn't have to transmit through as much concrete and weaken its signal).
- find a wired doorbell kit, go down to the nearest hardware store and get a bunch of additional cable, similar in gauge to the doorbell kit. Splice it into the middle of the doorbell wires and wire it up yourself from the front door to your front door, using cable clips or duct tape and run it along the floor or whatever
- ultra dodgy but perfectly feasible - if you have PCCW DSL wired to your apartment but not in use, the cabinet may be right next to the front door. Therefore you have 2/4 wires already cabled from the front door up to the inside of your apartment. Get a wired doorbell kit and wire it in (with a sparky/cabler doing it and assuming the cabinet is properly labeled). Quite probably beyond dodgy and into illegal territory but would certainly work the best. You wouldn't be the first to do this, not going to tell you how I can say this...
Whichever of these, and put a sticker on the doorbell with your apartment number on it.