Yealink SIP-T27P [482/841] Procedure

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones

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indicator LED slow flashes red and the MESSAGE key LED lights up (MESSAGE key LED

is only applicable to SIP-T29G/T27P/T23P/T23G/T21(P) E2 IP phones). For more information

on power indicator LED, refer to Power Indicator LED on page 91.

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

<MAC>.cfg

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

Local

Web User Interface