4.4.4.4 Start Day and Time of DST (Start Day and Time of Summer Time) .........................110Month ......................................................................................................................110Day of Week ...........................................................................................................111Time ........................................................................................................................1124.4.4.5 End Day and Time of DST (End Day and Time of Summer Time) ............................112Month ......................................................................................................................112Day of Week ...........................................................................................................112Time ........................................................................................................................1134.4.5 Advanced Settings .......................................................................................................1134.4.5.1 Soft Key during IDLE Status ......................................................................................113Soft Key A (Left) ......................................................................................................113Soft Key B (Center) .................................................................................................114Soft Key C (Right) ...................................................................................................1144.4.5.2 IP Phone ....................................................................................................................114Enable Admin Ability ...............................................................................................114Enable IP Phone Lock ............................................................................................115Password for Unlocking ..........................................................................................1154.5 VoIP ................................................................................................................................1154.5.1 SIP Settings ..................................................................................................................1154.5.1.1 User Agent .................................................................................................................116User Agent ..............................................................................................................1164.5.1.2 NAT Identity ...............................................................................................................116Enable Rport (RFC 3581) .......................................................................................116Enable Port Punching for SIP .................................................................................116Enable Port Punching for RTP ................................................................................1174.5.2 SIP Settings [Line 1]–[Line 2] .......................................................................................1174.5.2.1 Basic ..........................................................................................................................118Phone Number ........................................................................................................118Registrar Server Address ........................................................................................118Registrar Server Port ..............................................................................................118Proxy Server Address .............................................................................................118Proxy Server Port ....................................................................................................118Presence Server Address .......................................................................................119Presence Server Port ..............................................................................................119Outbound Proxy Server Address ............................................................................119Outbound Proxy Server Port ...................................................................................119Service Domain .......................................................................................................120Authentication ID .....................................................................................................120Authentication Password ........................................................................................1204.5.2.2 Advanced ...................................................................................................................120SIP Packet QoS (DSCP) .........................................................................................120Enable DNS SRV lookup ........................................................................................120SRV lookup Prefix for UDP .....................................................................................121SRV lookup Prefix for TCP .....................................................................................121SRV lookup Prefix for TLS ......................................................................................121Local SIP Port .........................................................................................................122SIP URI ...................................................................................................................122T1 Timer ..................................................................................................................122T2 Timer ..................................................................................................................123REGISTER Expires Timer ......................................................................................123Enable Session Timer (RFC 4028) .........................................................................123Session Timer Method ............................................................................................123Enable 100rel (RFC 3262) ......................................................................................124Enable SSAF (SIP Source Address Filter) .............................................................124Enable c=0.0.0.0 Hold (RFC 2543) .........................................................................124Document Version 2015-02 Administrator Guide 7Table of Contents