| 摘要 |
Loop extenders (224, 226, 228, 229, 230) for improving the transmission of DSL signals over a local loops (214, 216, 218, 220). The loop extenders (224, 226, 228, 229, 230) include selectable line termination and equalization (SLTE) DSL amplification circuitry capacitively coupled to the local loops (214, 216, 218, 220) via bypass relay switches, POTS loading coil adapted to be coupled to the local loops (224, 226, 228, 229, 230) for improving transmission of POTS band signals over the local loops(214, 216, 218, 220) for receiving and processing control signals from a central office(202), coupled to the bypass relay switches via bypas relay for controlling the bypass relay switches, and coupled to the SLTE DSL amplification circuitry via a plurality of switch control lines for controlling the SLTE DSL amplification circuitry. |
