KVM switch configured to estimate a length of a conductor

Details KVM switch configured to estimate a length of a conductor KVM switch configured to estimate a length of a conductor

2008-06-10

2008-06-10

Nguyen, Vincent Q (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S617000, C439S108000, C702S079000

Reexamination Certificate

active

07385403

ABSTRACT:
A system for estimating a length of a conductor (110) having a first end (111) and a second end (112) includes a device (120) capable of placing an electric signal on the conductor, an impedance element (130) that maintains the electric signal within a predetermined voltage range, and a timer (140). The device places the electric signal on the conductor such that the electric signal travels along the conductor from the first end to the second end and back to the first end. The timer determines a time required for the electric signal to travel along the conductor from the first end to the second end and back to the first end. The length of the conductor may be estimated based on the time. A compensation factor may be determined based on the length or the time, and may be used to compensate for signal attenuation in the conductor.

REFERENCES:
patent: 4970466 (1990-11-01), Bolles et al.
patent: 5382910 (1995-01-01), Walsh
patent: 6618774 (2003-09-01), Dickens et al.
patent: 6646454 (2003-11-01), Watkins
patent: 6771076 (2004-08-01), Smith
patent: 2003/0218578 (2003-11-01), Ahern et al.
patent: 2005/0227517 (2005-10-01), Chen
Internet: Avocent Enterprise KVM Switches and KVM Over IP solutions—AMX5000 KVM Switch, [http://www.avocent.com/web/en.nsf/Content/AMX5000]; retrieved from the internet on Jan. 25, 2005.

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