| 摘要 |
<p>A device for reducing effects of quarter-wave shorts caused by branched wiring on communications over a twisted-pair communication link. An external telephone wiring (38) is terminated at a network interface (NID) or junction box (12) located on the exterior of the home or premises. A household telephone wire (10) is routed from the jacks on the NID to a number of telephone jacks (14) within the home. The telephone jacks (14) are located in various rooms around the house, and thus provide connectivity to these jacks. The telephone wiring will have multiple 'tie-ins' or wiring branches (16) of various lengths and configurations. These tie-ins create areas of attenuation at certain frequency ranges. These areas of attenuation are known as RF quarter-wave shorts. Using a synthetic delay line, the device can change a length and delay of the branch, and move the quarter-wave shorts to some other frequency range, and thus avoiding interference with shared-communications over the twisted-pair communication link.</p> |
