• ETSI ETS 300 745-1
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ETSI ETS 300 745-1

  • Integrated Services Digital Network (ISDN); Message Waiting Indication (MWI) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification
  • standard by European Telecommunications Standards Institute, 07/01/1997
  • Publisher: ETSI

$21.00$41.00


ISDN UNI layer 3 signalling protocol for supplementary service. MWI is to support (voice) mail systems. It offers the possibility to give an indication that (voice) mail is available to the intended recipient.

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