Yealink SIP-T54S Administrator's Manual page 277

Phone User Interface
Details of Configuration Parameters:
Parameters
local_time.manual_ntp_srv_prior
Description:
Configures the priority for the IP phone to use the NTP server address offered by the DHCP
server.
0-High (use the NTP server address offered by the DHCP server preferentially)
1-Low (use the NTP server address configured manually preferentially)
Web User Interface:
Settings->Time & Date->NTP by DHCP Priority
Phone User Interface:
None
local_time.dhcp_time
Description:
Enables or disables the IP phone to update time with the offset time offered by the DHCP
server.
0-Disabled
1-Enabled
Note: It is only available to offset from Greenwich Mean Time (GMT).
Web User Interface:
Settings->Time & Date->DHCP Time
Phone User Interface:
Menu->Basic->Time & Date->DHCP Time->DHCP Time
local_time.ntp_server1
Description:
Configures the IP address or the domain name of the NTP server 1.
The IP phone will obtain the current time and date from the NTP server 1.
Example:
=settings-datetime&q=load
Configure DHCP time feature.
Configure the NTP server, time zone.
Permitted Values
0 or 1
0 or 1
IP address or domain name
Configuring Basic Features
Default
0
0
cn.pool.ntp.org
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