41-001024-00, Rev 09, Release 1.4.1 iiiContentsContentsAbout this Document ...................................................................................................... 1General Information ........................................................................................................ 2Release Content Information ...................................................................................... 2Hardware Supported ................................................................................................... 2Bootloader Requirements ........................................................................................... 2Upgrade Notes ............................................................................................................ 3New Features in 1.4.1 ...................................................................................................... 4Description .................................................................................................................. 4SIP Timers .................................................................................................................. 7SIP Registration Renewal Timer ........................................................................... 7SIP Registration Timeout Retry Timer .................................................................. 9“SIP Registration Retry Timer” Web UI Parameter Name Change ..................... 10Explicit Message Waiting Indicator (MWI) Subscription Period .......................... 11Prefix Dialing ............................................................................................................. 13How it works ....................................................................................................... 13Configuring via the Configuration Files ............................................................... 14Configuring via the Aastra Web UI ..................................................................... 15Last Number Redial .................................................................................................. 15XML Objects and Enhancements .............................................................................. 16XML: AastraIPPhoneStatus object ..................................................................... 16XML: AastraIPPhoneExecute Object .................................................................. 23XML: Action URI ................................................................................................. 25XML: Softkey URI ............................................................................................... 30XML: HTTP Refresh Header .............................................................................. 33Backup Proxy/Registrar Support ............................................................................... 34How it Works ....................................................................................................... 34Configuring via the Configuration Files ............................................................... 34Auto-discovery Using mDNS ..................................................................................... 39