Abstract
In order to provide digital communication from user to user, it is necessary to extend the digital transmission capability from the local exchange to the subscriber’s premises. The very large investment in local line plant means that it is not economically viable to replace all existing wire-pair circuits with cables designed specifically for digital transmission. Various techniques have therefore been proposed to enable the existing local lines to be used for digital access to the Integrated Digital Network (IDN). The relationship between the ISDN, IDN and Digital Access is illustrated in Fig. 6.1.
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© 1993 Springer Science+Business Media Dordrecht
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Brewster, R.L. (1993). Digital Local Access. In: ISDN Technology. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1592-6_6
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DOI: https://doi.org/10.1007/978-94-011-1592-6_6
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4693-0
Online ISBN: 978-94-011-1592-6
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