| 摘要 |
<p>Communication failure in DSL circuits can result from noise or other problems in the DSL circuit. Currently wideband DSL measurement methods are invasive and require disruption of the communications link between the telephone company DSL terminal (DSLAM) and the subscriber home DSL equipment. A bridge module is provided for connection between first and second conductors of a line under test to a test instrument. The bridge module includes first and second high impedance resistors connected with the first and second conductors of the line under test and first and second input switches connected with the first and second conductors of the line under test. First and second coupling capacitors are provided and connected with the input switches and the resistors. The bridge module provides a clickless connection of the bridge module to the active DSL communications link to avoid disruption in DSL service.</p> |
