Patent ID: 7324456

Claim:
An apparatus for testing an xDSL transceiver unit-central office, comprising: a multiplexer for connecting all ports of a modem installed in a transceiver unit-central office, and for setting a link with a subscriber transceiver unit by selecting one of the ports of the modem according to a link setup control signal; a line simulator for supplying line types designated according to a test environment setup control signal and line states in accordance with a set noise; and a tester for storing a set test environment from a user, for transmitting the link setup control signal having a link number for test to the multiplexer, for transmitting the test environment setup control signal to the line simulator after designating line types and setting noise, for activating a port to be tested by transmitting the link setup control signal having the link number for test and a designated communication parameter value of the link to the transceiver unit-central office, and for receiving and storing link states from the transceiver unit-central office.