Yealink SIP-T2 SERIES Administrator's Manual page 603

indicator LED slow flashes red and the MESSAGE key LED lights up (MESSAGE key LED
is only applicable to SIP VP-T49G/SIP-T29G/T27P/T23P/T23G/T21(P) E2 IP phones). For
more information on power indicator LED, refer to
IP phones support both solicited and unsolicited MWI.
Unsolicited MWI
Unsolicited MWI is a server related feature. The IP phone sends a SUBSCRIBE message
to the server for message-summary updates. The server sends a message-summary
NOTIFY within the subscription dialog each time the MWI status changes.
Solicited MWI
For solicited MWI, you must enable MWI subscription feature on IP phones. IP phones
support subscribing the MWI messages to the account or the voice mail number.
Procedure
Configuration changes can be performed using the configuration files or locally.
Configuration File
Local
<MAC>.cfg
Web User Interface
Configuring Advanced Features
Power Indicator LED on page 103.
Configure subscribe for MWI.
Parameters:
account.X.subscribe_mwi
account.X.subscribe_mwi_expires
Configure subscribe MWI to voice
mail.
Parameters:
account.X.subscribe_mwi_to_vm
Configure the
voice mail number for
account X.
Parameter:
voice_mail.number.X
Configure the presentation of audio
and visual MWI.
Parameter:
account.X.display_mwi.enable
Configure subscribe for MWI.
Configure subscribe MWI to voice
mail.
Configure the
voice mail number for
account X.
Configure the presentation of audio
and visual MWI.
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