Yealink SIP-T21 Bedienungsanleitung PDF herunterladen (Seite 123)

Advanced Phone Features

113

will be indicated in three ways: a warning tone, a prompt message (including a voice

mail icon) on the LCD screen, and the MESSAGE key LED illuminates solid green. This

will be cleared when you retrieve all voice mails or delete them.

The MWI service is unsolicited for some servers, so the SIP-T21P/SIP-T21 IP phone only

handles the MWI messages sent from the server. But for other servers, the MWI service

is solicited, so the SIP-T21P/SIP-T21 IP phone must enable subscription for MWI.

Note

The MWI Subscription parameters you need to know:

Option

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 configure subscribe for

MWI and the voice mail number in advance.

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 field.

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 mail number depends on the server. Contact your system administrator for more

information.

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