User Guide

User Guide for the SIP-T41S IP Phone
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Message Waiting Indicator (MWI)
The SIP-T41S IP phone supports MWI feature when receiving a new voice message. If someone
leaves you a voice mail, you will receive a message waiting indicator. MWI will be indicated in
three ways: a warning tone, an indicator message (including a voice mail icon) on the LCD screen,
and the power indicator LED slowly flashes red. This will be cleared when you retrieve all voice
mails or delete them.
The MWI service is unsolicited for some servers, so the SIP-T41S IP phone only handles the MWI
messages sent from the server. But for other servers, the MWI service is solicited, so the
SIP-T41S 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 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.
MWI service is not available on all servers. Contact your system administrator for more
information.
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.