Technology - Infrastructure - Last Mile 1 - Twisted Pair, POTS, ISDN

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Last updated: 2 Aug 2006 Update History

Report Status: Archived

Report Pages: 10

Analyst: Robin Whittle


The twisted pair copper cables of the Plain Old Telephone Service are also used for ISDN services and for Digital Subscriber Line technologies. We describe twisted-pair’s characteristics, POTS analogue phones, modems and Basic and Primary Rate ISDN. We also discuss the widely deployed pair-gain systems which extend the number of analogue services which can be carried over one pair, but which prevent the deployment of DSL and ISDN services.

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