Yealink SIP-T48S User Manual

Customizing Your Phone
55
To change the language for the web user interface:
1. Select the desired language from the pull-down list at the top-right corner of web user
interface.
Text displayed on the web user interface will change to the selected language.
Time & Date
The time and date are displayed on the right of the status bar. You can configure the phone to
obtain the time and date from the SNTP server automatically, or configure the time and date
manually. If the phone cannot obtain the time and date from the Simple Network Time Protocol
(SNTP) server, contact your system administrator for more information.
To configure the SNTP setting via phone user interface:
1. Tap ->Basic->Time & Date->General.
2. Tap the gray box of the Type field, and then select SNTP Settings from the pull-down list.
3. Tap the gray box of the Time Zone field, and then select the time zone that applies to your
area from the pull-down list.
The default time zone is “+8”.
4. Enter the domain name or IP address of SNTP server in the NTP Server1 and NTP Server2
field respectively.
5. Tap the gray box of the Daylight Saving field, and then select the desired value from the
pull-down list.
6. Tap the gray box of the Location field, and then select the desired time zone name from
the pull-down list

Yealink SIP-T48S Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Keypad illumination	Yes
Display diagonal	7 \
Display resolution	800 x 480 pixels
AC adapter input voltage	100 - 240 V
AC adapter output current	2 A
AC adapter output voltage	5 V
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Front camera	No
Voice codecs	CNG, G.711Mu, G.711a, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Lines quantity	16 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Keypad number of keys	42
Security algorithms	AES
Networking standards	IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	SIP v1, SIP v2, LLDP/CDP/DHCP, OpenVPN, IEEE802.1X, IPv6, HTTPS
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	225 mm
Width	266 mm
Height	185 mm
Package depth	263 mm
Package width	324 mm
Package height	128 mm