A method for implementing a cutover of a subscriber telephone line from a telephone line of a first exchange to a telephone line of a second exchange, includes the following steps: providing a controllable switch that is operative, in response to a control signal, to couple the subscriber telephone line to either the telephone line of the first exchange or the telephone line of the second exchange; providing a controller, coupled with at least one of the telephone line of the first exchange and the telephone line of the second exchange, for producing the control signal, coupled to the switch, upon receiving a predetermined signal over said at least one of the telephone line of the first exchange and the telephone line of the second exchange; initially setting the switch to couple the subscriber telephone line to the telephone line of the first exchange; and sending the predetermined signal over at least one of the telephone line of the first exchange and the telephone line of the second exchange, whereby the controller, upon receipt of the predetermined signal, produces the control signal to cause the switch to couple the subscriber telephone line to the telephone line of the second exchange.