Patent ID: 6845103

Claim:
In a discrete multi-tone (DMT) system for establishing a connection between a first device and a second device, an apparatus for controlling initialization of the DMT system, comprising: transmitting means for transmitting a plurality of connection acknowledgment tone signals having different frequencies from the first device to the second device at regular time intervals; and recognizing means for recognizing a connection with the second device based on whether or not a response tone signal transmitted from the second device in response to one of the plurality of connection acknowledgment tone signals is detected, wherein the transmitting means comprises timer means for setting a time limit for detecting a response tone signal, tone signal generator means for generating a first connection acknowledgment tone signal at a predetermined frequency according to the control of the controller, and wherein the tone signal generator means outputs a second connection acknowledgment tone signal at a predetermined frequency different from the frequency of the first connection acknowledgment tone signal according to the control of the controller if the first response tone signal is not received from the at least one remote terminal within the time limit set by the timer means.