@amish - you are right in a way. Yes MTNL did state that it was Re 1. But I believe that was a over simplification. To the best of my knowledge, MTNL has no way of metering in terms of money on the landline. They meter pulses. So even though they said Re 1/- per minute, that would be true only if you were on a tariff slab that was Re 1/-.I believe it has always been 1 pulse per minute right from the time they introduced it.