System Settings; Security Settings - Grandstream Networks GHP6 Series Administration Manual

System Settings

Time
NTP Server
Secondary NTP Server
Enable Authenticated NTP
NTP Update Interval
Allow DHCP Option 42 to Override NTP
Server
Time Zone
Allow DHCP Option 2 to Override Time Zone
Settings
Self-Defined Time Zone

Security Settings

Speed Dial Configuration
Date and Time
Configures the URL or IP address of the NTP server. The phone may obtain
the date and time from the server.
Configures the URL or IP address of the NTP server. The phone may obtain
the date and time from the server.
Configures whether to enable NTP authentication. If enabled, a
cryptographic signature is appended to each network packet. If the key is
incorrectly configured, the phone will refuse to use the time provided by the
NTP server.
Configures interval for updating time from the NTP server. The valid value is
between 5 and 1440 minutes.
When enabled, DHCP Option 42 will override the NTP server if it is set up on
the LAN.
Configures the date/time used on the phone according to the specified time
zone.
Allows device to get provisioned for Time Zone from DHCP option 2 in the
local server
This parameter allows the users to specify their own time zone. For syntax
and examples please refer to user manual.