Advanced  Phone  Features 
163 
The MWI subscription parameters you need to know: 
Enable or disable a subscription for MWI service. 
Period of MWI subscription. The IP phone sends a 
refresh SUBSCRIBE request before initial SUBSCRIBE 
expiration. 
Subscribe MWI To Voice 
Mail 
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->Advanced. 
2.  Select the desired account from the pull-down list of Account. 
3.  Select Enabled from the pull-down list of Subscribe for MWI field. 
4.  Enter the period time in the MWI Subscription Period(Seconds) field. 
 
5.  Click Confirm to accept the change. 
The IP phone will subscribe to the account number for MWI service by default. 
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