Yealink SIP-T27G User Manual page 214

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User Guide for the SIP-T27G IP Phone
Note
204
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The MWI subscription parameters you need to know:
Options
Subscribe for MWI
MWI Subscription Period
Subscribe MWI To Voice
Mail
The phone will send SUBSCRIBE messages for the MWI service to the account or the voice
number MWI service depending on the server. Contact your system administrator for more
information.
To configure subscribe for MWI via web user interface:
Click on Account->Advanced.
1.
Select the desired account from the pull-down list of Account.
2.
Select Enabled from the pull-down list of Subscribe for MWI.
3.
Enter the period time in the MWI Subscription Period(Seconds) field.
4.
Click Confirm to accept the change.
5.
The IP phone will subscribe to the account number for MWI service by default.
Description
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 also configure the voice
mail number.