Table of ContentsxixLightweight Directory Access Protocol (LDAP) .................................................................................... 461Busy Lamp Field (BLF)..................................................................................................................................... 473BLF Subscription ...................................................................................................................................... 473Visual Alert and Audio Alert for BLF Pickup ................................................................................ 477BLF LED Mode .......................................................................................................................................... 479Configuring a BLF Key........................................................................................................................... 482Busy Lamp Field (BLF) List ............................................................................................................................ 486Hide Feature Access Codes .......................................................................................................................... 492Shared Call Appearance (SCA).................................................................................................................... 494Message Waiting Indicator (MWI) ............................................................................................................ 503Multicast Paging ............................................................................................................................................... 508Sending RTP Stream .............................................................................................................................. 508Receiving RTP Stream ........................................................................................................................... 519Call Recording Using DSS Keys (Record and URL Record) ............................................................. 524Hot Desking ........................................................................................................................................................ 531Logon Wizard .................................................................................................................................................... 536Action URL .......................................................................................................................................................... 540Action URI ........................................................................................................................................................... 560Configuring Trusted IP Address for Action URI ......................................................................... 564Scenario A - Capturing the Current Screen of the Phone ..................................................... 566Scenario B - Placing a Call via Web User Interface ................................................................... 568Server Redundancy.......................................................................................................................................... 569Server Domain Name Resolution..................................................................................................... 581Static DNS Cache.............................................................................................................................................. 584Real-Time Transport Protocol (RTP) Ports ............................................................................................. 592TR-069 Device Management ....................................................................................................................... 594Configuring Audio Features ........................................... 601Redial Tone ......................................................................................................................................................... 601Ring Tones .......................................................................................................................................................... 602Distinctive Ring Tones .................................................................................................................................... 607Tones ..................................................................................................................................................................... 614Voice Mail Tone ................................................................................................................................................ 621Ringer Device for Headset ........................................................................................................................... 622Headset Prior ..................................................................................................................................................... 624Dual Headset...................................................................................................................................................... 626Sending Volume ............................................................................................................................................... 627Audio Codecs ..................................................................................................................................................... 629Supported Audio Codecs .................................................................................................................... 630Packetization Time (PTime) ................................................................................................................ 638Opus Sample Rate .................................................................................................................................. 640Acoustic Clarity Technology ........................................................................................................................ 642Acoustic Echo Cancellation (AEC) .................................................................................................... 642Background Noise Suppression (BNS) ........................................................................................... 643