Advanced Phone Features63This chapter provides operating instructions for the advanced features of the SIP-T22P IPphone. The topics include: Busy Lamp Field (BLF) BLF List Shared Line Call Recording Hot Desking Intercom Multicast Paging Music on Hold Automatic Call Distribution (ACD) MessagesIf you require additional information or assistance with your new phone, contact yoursystem administrator.You can use the BLF feature to monitor a specific user for status changes on the phone.For example, you can configure a BLF key on the phone for monitoring the status of afriend‟s phone (busy or idle). When the friend picks up his phone to make a call, the BLFkey LED illuminates flashing green on your phone to indicate that the friend‟s phone is inuse and busy. For more BLF key LED indications, refer to LED Instructions on page 5.You can press a BLF key to dial out the monitored user when he is in idle. You can alsopick up a call directly by pressing the BLF key when the monitored user is ringing. Formore 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.