Patent ID: 7016402

Claim:
A DSL modem, comprising: a connector comprising a first pair of conductors and a second pair of conductors; circuitry for transmitting according to a DSL protocol; circuitry for receiving according to a DSL protocol; switching circuitry operable to selectively switch to a first position to couple the circuitry for transmitting and the circuitry for receiving to the first pair of conductors and to a second position to couple the circuitry for transmitting and the circuitry for receiving to the second pair of conductors; and circuitry for controlling the switching circuitry to switch to one of the first position and the second position and for then detecting whether DSL service exists along the pair of conductors to which the circuitry for transmitting and the circuitry for receiving is then coupled, wherein the circuitry for detecting detects whether DSL service exists in response to a DSL transmission provided by the circuitry for transmitting and in response to a DSL received signal receiving by the circuitry for receiving.