Yealink SIP-T21 E2 Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
250
Option
Configuration Methods
Daylight Saving Time
Configuration Files
Web User Interface
NTP Time Server
A time server is a computer server that reads the actual time from a reference clock and
distributes this information to the clients in a network. The Network Time Protocol (NTP) is the
most widely used protocol that distributes and synchronizes time in the network.
The IP phones synchronize the time and date automatically from the NTP time server by
default. The NTP time server address can be offered by the DHCP server or configured
manually. NTP by DHCP Priority feature can configure the priority for the IP phone to use the
NTP time server address offered by the DHCP server or configured manually.
Time Zone
A time zone is a region on Earth that has a uniform standard time. It is convenient for areas in
close commercial or other communication to keep the same time. When configuring the IP
phone to obtain the time and date from the NTP time server, you must set the time zone.
Procedure
NTP time server and time zone can be configured using the following methods.
Central Provisioning
(Configuration File)
<MAC>.cfg
Configure NTP by DHCP priority
feature and DHCP time feature.
Parameters:
local_time.manual_ntp_srv_prior
local_time.dhcp_time
Configure the NTP server, time zone.
Parameters:
local_time.ntp_server1
local_time.ntp_server2
local_time.interval
local_time.time_zone
local_time.time_zone_name
Web User Interface
Configure NTP by DHCP priority
feature and DHCP time feature.
Configure the NTP server, time zone.
Navigate to:
http://<phoneIPAddress>/servlet?p

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English