Patent ID: 7849351
Filing Date: 2010-12-07
Classification: H04L

Abstract:
1. A method for providing redundancy from a first network device and a second network device through a Y device having a first, second and third port in a wired data telecommunications network having at least two pairs of twisted pair conductors, the Y device configured so that at least two pairs of twisted-pair conductors are connected at each of its first, second and third ports so that first, second and third connectors correspondingly associated with said first, second and third ports have connection contacts connected so that a first connection contact of each of said first, second and third connectors are all connected together, a second connection contact of each of said first, second and third connectors are all connected together, a third connection contact of each of said first, second and third connectors are all connected together, and a fourth connection contact of each of said first, second and third connectors are all connected together, the method comprising: coupling the first network device configured as power sourcing equipment (PSE) to the first port of the Y device; coupling the second network device configured as PSE to the second port of the Y device; coupling a third network device configured as a powered device (PD) to the third port of the Y device; dynamically adjusting a termination impedance associated with at least one of a wired data telecommunications network termination of the first network device and a wired data telecommunications network termination of the second network device; and in response to dynamically adjusting the termination impedance associated with the at least one of a wired data telecommunications network termination of the first network device and a wired data telecommunications network termination of the second network device, causing an impedance experienced by the third network device across the wired data telecommunications network and into the Y device to be equal to a characteristic impedance value.