Have dial tone and can make outgoing calls, but no one can call us?

you seem to have a rectified loop on the line as this only affects incoming calls.what you may find is the phone rings onceor twice and then stops but if you pick the phone up and the other person is still on the line it works.first unplug everything from all your sockets in the house and ring your home number from your mobile.if it still does the fault then go to the master point and disconnect any extensions/additional wires this way eliminatting any problems on your own equipment.ring it again and if the fault is still there it seems to be a line fault coming to your house

andy
February 2009