4.4.3.1 Admin Password ........................................................................................................110Current Password ...................................................................................................110New Password ........................................................................................................110Confirm New Password ..........................................................................................1104.4.4 Time Adjust Settings ....................................................................................................1114.4.4.1 Synchronization .........................................................................................................111Server Address .......................................................................................................111Synchronization Interval .........................................................................................1114.4.4.2 Time Zone .................................................................................................................112Time Zone ...............................................................................................................1124.4.4.3 Daylight Saving Time (Summer Time) .......................................................................112Enable DST (Enable Summer Time) ......................................................................112DST Offset (Summer Time Offset) ..........................................................................1124.4.4.4 Start Day and Time of DST (Start Day and Time of Summer Time) .........................112Month ......................................................................................................................112Day of Week ...........................................................................................................113Time ........................................................................................................................1144.4.4.5 End Day and Time of DST (End Day and Time of Summer Time) ............................114Month ......................................................................................................................114Day of Week ...........................................................................................................114Time ........................................................................................................................1154.4.5 Advanced Settings .......................................................................................................1154.4.5.1 Soft Key during IDLE Status ......................................................................................115Soft Key A (Left) ......................................................................................................115Soft Key B (Center) .................................................................................................116Soft Key C (Right) ...................................................................................................1164.4.5.2 IP Phone ....................................................................................................................116Enable Admin Ability ...............................................................................................116Enable IP Phone Lock ............................................................................................117Password for Unlocking ..........................................................................................1174.5 VoIP ................................................................................................................................1174.5.1 SIP Settings ..................................................................................................................1174.5.1.1 User Agent .................................................................................................................118User Agent ..............................................................................................................1184.5.1.2 NAT Identity ...............................................................................................................118Enable Rport (RFC 3581) .......................................................................................118Enable Port Punching for SIP .................................................................................118Enable Port Punching for RTP ................................................................................1194.5.2 SIP Settings [Line 1]–[Line 2] .......................................................................................1194.5.2.1 Basic ..........................................................................................................................120Phone Number ........................................................................................................120Registrar Server Address ........................................................................................120Registrar Server Port ..............................................................................................120Proxy Server Address .............................................................................................120Proxy Server Port ....................................................................................................120Presence Server Address .......................................................................................121Presence Server Port ..............................................................................................121Outbound Proxy Server Address ............................................................................121Outbound Proxy Server Port ...................................................................................121Service Domain .......................................................................................................121Authentication ID .....................................................................................................122Authentication Password ........................................................................................1224.5.2.2 Advanced ...................................................................................................................122SIP Packet QoS (DSCP) .........................................................................................122Enable DNS SRV lookup ........................................................................................122Document Version 2015-12 Administrator Guide 7Table of Contents