Title: Automatic cable balancing network

Abstract: Disclosed is apparatus for automatically balancing the hybrid network in a telephone system having a bidirectional cable connected to a first preselected hybrid network port and a balancing network connected to a second preselected hybrid network port. In response to a test signal applied to a third port of the hybrid network, the disclosed apparatus develops control signals in response to the magnitude and phase of signals at the hybrid network's first and second ports. These signals adjust the impedance of the balancing network to effect hybrid network balance.

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Inventors: Ukeiley, Richard Larry (Englishtown, NJ, US)

Application Number: 541415
Filing Date: 1975-01-16
Publication_date: 1976-09-21
Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ)
Primary Class(es): 379/403
Other Classes:
US Patent Ref:

2302374	Nov, 1942	Mitchell	179/170.
2303419	Dec, 1942	Affel	179/170.
3178521	Apr, 1965	Brown	179/170.
3824501	Jul, 1974	Harris	333/18.
3875350	Apr, 1975	Fischer	179/170.

Other Refs:
Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Myers, Randall P.
Attorney: Logan; H. L.