[특허]Local orderwire facility for fiber optic communication system

[미국특허] Local orderwire facility for fiber optic communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/20
출원번호	US-0173876 (1980-07-30)
발명자 / 주소	Waschka Jr. George A. (Melbourne FL)
출원인 / 주소	Harris Corporation (Melbourne FL 02)
인용정보	피인용 횟수 : 125 인용 특허 : 1

초록 ▼

An orderwire communication scheme for a fiber optic communication network includes terminal station equipment associated with the central offices at opposite ends of the network and signal regenerator equipment at the repeater sites disposed between the terminal stations. The communication format along the link is a data-over-voice scheme, the data being digitally encoded on an FSK modulated carrier. In carrying out supervisory functions with respect to each of the stations along the link, command messages are conveyed from the terminal stations at one of the central offices to respective stations along the link in the form of command instructions. Each command message from a central office\s terminal station contains the address of the recipient station for whom the message is intended followed by a specific encoded instruction. The instruction may contain a request for information from the addressed site as to equipment conditions at the side and/or a directive that the equipment at the site perform a particular task. In reply to the command message sent to it, the addressed site transmits a response message back to the source station, representative of the status of a particular equipment condition or operation as requested by the command instruction. In this manner, supervisory personnel at each central office may remotely monitor and control the operation of the commuication equipment at the various sites along the link and thereby take correction maintenance or protection channel substitution action where and when required. The digital message transmission scheme also provides facility for fault/alarm reporting, testing the bit error rate of individual channels of the repeater and the transceiver equipment at each terminal station when requested, and is used for paging signalling between central offices.

대표청구항 ▼

In a data scrambler in which incoming data is subjected to a prescribed scrambling code so as to produce an output scrambled data sequence, an arrangement for preventing said scrambler from locking into a continuous state comprising: first means, coupled to said scrambler, for comparing selected contents of said scrambler with incoming data to be scrambled; and second means, coupled to said first means and disposed in the data flow path between said incoming data and said scrambler, for altering the data to be coupled into said scrambler, in response to said first means detecting a potential lock condition.

이 특허에 인용된 특허 (1) 인용/피인용 타임라인 분석

Foulkes John D. (Kirkland WA) Worthington David K. (Bellevue WA) Trombly John E. (Winchester MA), Audio and full duplex digital data carrier system.
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[미국특허] Local orderwire facility for fiber optic communication system 원문보기

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