ETSI EN 300 659-2

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ETSI EN 300 659-2 English PDF Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services; Part 2: Off-hook data transmission

standard published 01/01/2001 by European Telecommunications Standards Institute

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Definition of the protocol for off hook data transmission on analogue lines required to support display services such as Calling Line Identification Presentation for the PSTN.