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Advanced Phone Features

This chapter provides operating instructions for the advanced features of the

SIP-T21P/SIP-T21 IP phone. Topics include:

 Busy Lamp Field (BLF)

 Call Recording

 Hot Desking

 Intercom

 Multicast Paging

 Music on Hold

 Automatic Call Distribution (ACD)

 Messages

If you require additional information or assistance with your new phone, contact your

system administrator.

You can use BLF to monitor a specific line for status changes on the phone. For example,

you can configure a BLF key on the phone for monitoring the status of a friend’s line

(busy or idle). The BLF key LED illuminates solid green when the friend's line is in use. For

more information on BLF key LED indications, refer to LED Instructions on page 4.

You can press a BLF key to dial out the monitored phone number when the monitored

line is idle. You can receive a visual and an audio alert (if enabled), and also pick up the

call when the monitored line receives an incoming call. For more information, contact

your system administrator.

To configure a BLF key via phone user interface:

1. Press Menu->Features->DSS Keys.

2. Select the desired DSS key.

3. Press or , or the Switch soft key to select BLF from the Type field.

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Yealink SIP-T21 Manuel d'utilisateur Page 105