Verfahren zur uebertragung schmalbandiger daten in einem digitalen breitbandkanal

Method for transmitting narrow-band data in a digital broadband channel

Abstract

In a broadband transmission method which provides that in the case of bits having the significance 1, the signal level in each case changes compared with the last occurrence of a 1 and the bits having the significance 0 exhibit a signal change in the centre of the bit period, a deliberate code violation is produced in the transmission of a bit of narrow-band data. Thus, when a bit of the broadband data is transmitted, a bit with a significance 1 is sent at the same level as the previous bit of the same type and with a bit having the significance 0, the signal change in the centre of the bit period is reversed. These code violations are detected at the receiving end and extracted as narrow-band data.

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    US-4071692-AJanuary 31, 1978International Standard Electric CorporationData transmission systems

NO-Patent Citations (1)

    Title
    K.W.CATTERMOLE, W.D.GROVER, "Optical Line codes bearing ancillary channels" IEE Colloquium on Data Transmission Codes, London, Nov.1980, S.7/1 bis 7/7

Cited By (3)

    Publication numberPublication dateAssigneeTitle
    EP-0434972-A2July 03, 1991Telenorma GmbhVerfahren zur Übertragungstechnischen Integration von ISDN-Kanälen mit einem breitbandigen asynchronen Zeitmultiplex-Kanal für digital betriebene Kommunikations-Vermittlungsanlagen
    EP-0434972-A3November 27, 1991Telenorma GmbhMethod for the integration of isdn channels within a wide band asynchronous tdm channel for digital switching systems
    WO-2004019578-A1March 04, 2004Pirelli & C. S.P.A.Encoding signaling information at a phaysical network layer by using code violations of an nb/mb line block code