Yealink SIP-T41S Administrator's Guide

Phone Customization
219
Black-and-white Screen Phones:
Menu > Settings > Basic Settings > Time&Date > DHCP Time
Parameter
local_time.ntp_server1 <y0000000000xx>.cfg
Description
It configures the IP address or the domain name of the primary NTP server.
Permitted
Values
String within 99 characters
Default
cn.pool.ntp.org
Web UI
Settings > Time&Date > Primary Server
Phone UI
Color Screen Phones:
Menu > Basic > Time & Date > General > SNTP Settings > NTP Server1
Black-and-white Screen Phones:
Menu > Settings > Basic Settings > Time&Date > SNTP Settings > NTP Server1
Parameter
local_time.ntp_server2 <y0000000000xx>.cfg
Description
It configures the IP address or the domain name of the secondary NTP server.
If the primary NTP server is not configured by the parameter “local_time.ntp_server1”, or cannot be
accessed, the phone will request the time and date from the secondary NTP server.
Permitted
Values
String within 99 characters
Default
pool.ntp.org
Web UI
Settings > Time&Date > Secondary Server
Phone UI
Color Screen Phones:
Menu > Basic > Time & Date > General > SNTP Settings > NTP Server2
Black-and-white Screen Phones:
Menu > Settings > Basic Settings > Time&Date > SNTP Settings > NTP Server2
Parameter
local_time.interval <y0000000000xx>.cfg
Description
It configures the interval (in seconds) at which the phone updates time and date from the NTP server.
Permitted
Values
Integer from 15 to 86400
Default
1000
Web UI
Settings > Time&Date > Update Interval (15~86400s)
Parameter
local_time.time_zone <y0000000000xx>.cfg
Description
It configures the time zone.
Permitted
Values
-12 to +14
For available time zones, refer to Time Zone.
Default
+8
Web UI
Settings > Time&Date > Time Zone
Phone UI
Color Screen Phones:
Menu > Basic > Time & Date > General > SNTP Settings > Time Zone

Yealink SIP-T41S Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Keypad illumination	Yes
Wi-Fi	No
Networking standards	IEEE 802.3af
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet LAN interface type	Fast Ethernet
Supported network protocols	SIP v1, SIP v2, LLDP/CDP/DHCP, OpenVPN, IEEE802.1X, IPv6, FTP/TFTP/HTTP/HTTPS
Volume control	Digital
Number of programmable keys	6
Lines quantity	6 lines
Phonebook capacity	1000 entries
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Input frequency	50/60 Hz
AC adapter input voltage	100 - 240 V
AC adapter output current	1.2 A
AC adapter output voltage	5 V
Display diagonal	2.7 \
Display resolution	192 x 64 pixels
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Voice codecs	CNG, G.711Mu, G.711a, G.723.1, G.726, G.729ab, VAD, iLBC
Certification	CE
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	189 mm
Width	212 mm
Height	175 mm
Package depth	223 mm
Package width	246 mm
Package height	120 mm