Yealink SIP-T4X Administration Manual page 159

Administrator's Guide for SIP-T4X IP Phones
3. Click Confirm to accept the change.
To configure the ACD auto available timer feature via web user interface:
1. Click on Features->ACD.
2. Select the desired value from the pull-down list of ACD Auto Available.
3. Enter the desired timer in the ACD Auto Available Timer (0~120s) field.
4. Click Confirm to accept the change.
To configure an ACD key via phone user interface:
1. Press Menu->Call Features->DSS Keys.
2. Select the desired DSS key.
3. Press
4. (Optional.) Enter the string that will appear on the LCD screen in the Label field.
5. Press the Save soft key to accept the change.
Message Waiting Indicator (MWI) informs users of the number of messages waiting in
their mailbox without calling the mailbox. IP phones support both audio and visual MWI
when receiving new voice messages.
IP phones support both solicited and unsolicited MWI. Unsolicited MWI is a server
related feature.
IP phone sends a SUBSCRIBE message to the server for message-summary updates.
The server sends a message-summary NOTIFY within the subscription dialog each time
the MWI status changes. For solicited MWI, you must enable the MWI subscription
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or , or the Switch soft key to select ACD from the Type field.