BTC must jack up service

This, without doubt holds the competitive edge over the popular cell phones.
Users of fixed line telephones would have noticed a disturbing trend that every time it rains, BTC lines usually go dead. We do not know whether this is the technology or some hardware used in these telephones. But this is what usually happens every time it rains some BTC lines - mostly residential lines - pack up.

Usually when you ring a number it will give you a ring tone while on the other end the gadget will not be responding. So the person you are calling will not hear the phone ringing.