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7 mwi (message waiting indication) – ZyXEL Communications Prestige 2602R Series User Manual

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Prestige 2602R Series User’s Guide

108

Chapter 7 Introduction to VoIP

7.7 MWI (Message Waiting Indication)

Enable Message Waiting Indication (MWI) enables your phone to give you a message–
waiting (beeping) dial tone when you have a voice message(s). Your voice service provider
must have a messaging system that sends message waiting status SIP packets as defined in
RFC 3842.