The Mwi Subscription Parameters You Need To Know; To Configure Subscribe For Mwi Via Web User Interface; Voice Mail - Yealink SIP-T21P User Manual

indicated in three ways: a warning tone, a prompt message (including a voice mail icon)
on the LCD screen, and the MESSAGE key LED illuminates solid green. This will be
cleared when you retrieve all voice mails or delete them.
The MWI service is unsolicited for some servers, so the SIP-T21P IP phone only handles
the MWI messages sent from the server. But for other servers, the MWI service is
solicited, so the SIP-T21P IP phone must enable subscription for MWI.
Note
MWI service is not available on all servers. Contact your system administrator for more
information.

The MWI Subscription parameters you need to know:

Option
Subscribe for MWI
MWI Subscription Period
Subscribe MWI to Voice
Mail
Note
Whether the phone sends SUBSCRIBE messages for MWI service to the account or the
mail
voice number depends on the server. Contact your system administrator for more
information.

To configure subscribe for MWI via web user interface:

1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Click on Advanced.
4. Select Enabled from the pull-down list of Subscribe for MWI field.
Enable or disable a subscription for MWI service.
Period of MWI subscription. The IP phone sends a
refresh SUBSCRIBE request before initial SUBSCRIBE
expiration.
Enable or disable a subscription to the voice mail
number for MWI service.
To use this feature, you should configure subscribe for
MWI and the voice mail number in advance.
Advanced Phone Features
Description
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