Patent ID: 7688744

Claim:
A broadband test line-access hoard comprising at least two broadband test line-access units, each of the at least two broadband test line-access units comprising a first test terminal, a second test terminal, a third test terminal, a signal splitter, a first switch, a second switch, a third switch, a first interface terminal, a second interface terminal and a third interface terminal, wherein the first test terminal is connected through a normally-closed contact of the first switch to a common terminal, the second test terminal is connected through a normally-closed contact of the second switch to the common terminal, the signal splitter is connected to a normally-closed contact of the third switch and the common terminal, and normally-opened contacts of the first switch, the second switch and the third switch are connected respectively to the first interface terminal, the second interface terminal and the third interface terminal; the broadband test line-access board further comprising a set of inner last buses, wherein the set of inner test buses comprises an internal inner-test bus, an internal outer-test bus and an internal auxiliary-test bus; the first interface terminal, the second interface terminal and the third interface terminal of each broadband test line-access unit being connected respectively to the internal inner-test bus, the internal outer-test bus and the internal auxiliary-test bus; characterized in that said broadband test line-access board further comprises a fourth switch, a fifth switch, a sixth switch and a low-pass filter unit, wherein the fourth switch is adapted to connect the internal inner-test bus to the internal outer-test bus, the fifth switch is adapted to connect the internal inner-test bus to the internal auxiliary-test bus, and the sixth switch is adapted to connect the internal outer-test bus to the internal auxiliary-test bus through the low-pass filter unit.