Yealink SIP-T48U Administrator's Guide

Phone Customization
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Customizing the Keypad Input Method File
When adding new characters for the existing input method, ensure that the added characters are supported by the
phones. The IP phone can only recognize the keypad input method files uploaded using Unicode encoding.
1.
Open the desired keypad input method file (for example, ime.txt).
2.
Under the input method field (for example, [abc]), add new characters or adjust the order of the characters within
the double quotation marks on the right of the equal sign.
3.
Save the keypad input method file.
4.
Rename the input method file (for example, custom_ime.txt), and place it to the provisioning server.
Note: If you just want to customize the input method for a certain language, the file name must be “language name_ime.txt”
(for example, German_ime.txt). The valid language names are: English, Chinese_S, Chinese_T, French_CA, French, Ger-
man, Italian, Polish, Portuguese, Portuguese_LA, Spanish, Spanish_LA, Turkish and Russian.
Onscreen Keyboard Input Method File Customization
The T57W/T48U/T48S/T48G phones support using the onscreen keyboard to enter data and provide English
onscreen keyboard by default. You can create a new language onscreen keyboard or customize the existing input
method files of the onscreen keyboard.
Yealink provides three types of input method files for onscreen keyboard customization. You can configure them as
required.
You can ask the distributor or Yealink FAE for onscreen keyboard input method files. You can also obtain the
onscreen keyboard input method files online: http://sup-
port.yealink.com/documentFront/forwardToDocumentFrontDisplayPage.
Topics
Description of the Onscreen Keyboard Input Method Files
Lang File Elements and Attributes
Customizing a Lang File
Ime File Elements and Attributes
Customizing an Ime File
Layout File Elements and Attributes
Customizing a Layout File

Yealink SIP-T48U Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Gray
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Voice codecs	AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithms	AES, HTTPS, SRTP, TLS
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Front camera	-
AC adapter input voltage	100 - 240 V
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Keypad number of keys	29
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Width	226 mm
Height	185 mm