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ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

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Message Waiting IndicatorA Message Waiting Indicator (MWI) is a light on a telephone set usedto inform the owner that they have incoming messages waiting for themin their voicemail box. It can be turned on <strong>and</strong> off by placing a virtualcall to a specified number <strong>and</strong> including a Non-Specified Information(NSI) SIS identifier.The identifier contains one default DPNSS 1 parameter (NN), <strong>and</strong> asecond parameter (set by <strong>Intervoice</strong>) that identifies whether the MWIindicator is on or off.The settings are shown below:• 0 – MWI OFF• 1 – MWI ONThe following toolkit calls are available for setting the Message WaitingIndicator (MWI) in an InVision application:• <strong>ISDN</strong>_DPNS_ACTIVATE_MWI (see page 6-67)• <strong>ISDN</strong>_DPNS_DEACTIVATE_MWI (see page 6-69)6-66 <strong>ISDN</strong> <strong>Protocol</strong> Administrator’s <strong>and</strong> Developer’s <strong>Guide</strong> 60001262, First Edition

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