Yealink SIP-T46G - Manual (Page 149)

Advanced Phone Features
139
The MWI service is unsolicited for some servers, so the SIP-T46G IP phone only handles
the MWI messages sent from the server. But for other servers, the MWI service is
solicited, so the SIP-T46G IP phone must enable subscription for MWI.
Note
The MWI subscription parameters you need to know:
Options Description
Subscribe for MWI Enable or disable a subscription for MWI service.
MWI Subscription Period
Period of MWI subscription. The IP phone sends a
refresh SUBSCRIBE request before initial SUBSCRIBE
expiration.
Subscribe MWI to VM
Enable or disable a subscription to the voice mail
number for MWI service.
To use this feature, you should also configure the
voice mail number.
Note
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.
MWI service is not available on all servers. Contact your system administrator for more
information.
Whether the phone sends SUBSCRIBE messages for MWI service to the account or the
voice number MWI service depends on the server. Contact your system administrator for
more information.