Dying Gasp

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The Dying Gasp signal (in the figurative sense: "death rattle") is an electronic notification signal of a broadband network termination device.

This signal is then sent by Customer Premises Equipment (CPE), such as a DSL modem , when it is switched off or when a power failure occurs. The Dying Gasp signal is a data layer signal that can be evaluated at the provider network interface (e.g. a DSLAM port).

As a result, during grid faults the compound (z. B. PPPoE ) Provider -sided without timeout separated , so that for a rapid elimination of the fault (at about DSL re-syncs ) a novel compound faster (and without trying multiple login ) can be built.

The Dying Gasp signal is currently e.g. B. specified for ADSL2 + and SHDSL .

literature

  • Charles K. Summers: ADSL: Standards - Implementation - and Architecture. CRC Press, Boca Raton 199, ISBN 0-8493-9595X .
  • Kristof Obermann, Martin Horneffer: Data network technologies for Next Generation Networks. Ethernet, IP, MPLS and others, 2nd edition, Springer Fachmedien, Wiesbaden 2013, ISBN 978-3-8348-1384-8 .
  • D. Hood: Gigabit-Capable Passive Optical Networks. John Wiley & Sons Inc, New Jersey 2012, ISBN 978-0-470-93687-0 .
  • ITU-T Recommendation G.991.2 , Section 7.1.2.5.3: fbit3 = ps (Power Status)

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