Yealink SIP-T48U Administrator's Guide

Using Handsets with T57W/T54W/T53W/T53 Phones
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Shared Contact File Elements and Attributes
The following table lists the elements and attributes you can use to add contacts in the shared contact file. We
recommend that you do not edit these elements and attributes.
Elements Attributes Description
Contact
display_name
Specify the contact name.
Note: The contact name cannot be blank or duplicated.
office_number Specify the office number.
mobile_number Specify the mobile number.
other_number Specify the other number.
line Do not modify this attribute and value.
ring Do not modify this attribute and value.
default_photo Do not modify this attribute and value.
selected_photo Do not modify this attribute and value.
group_id_name Do not modify this attribute and value.
Customizing Shared Contact File
1.
Open the shared contact file.
2.
To add a contact, add <contact display_name="" office_number="" mobile_number="" other_number="" line="-
1" ring="Auto" default_photo="Default:default_contact_image.png" selected_photo="0" group_id_name="All
Contacts"/ > to the file. Each starts on a new line.
3.
Specify the values within double quotes.
For example:
<contact display_name="Lily"office_number="1020" mobile_number="1021" other_number="1112"/ >
<contact display_name="Tom" office_number="2020" mobile_number="2021" other_number="2112"/ >
4.
Save the changes and place this file to the provisioning server.
Satellite Mode
Yealink desk phone can be bound with a handset. The handset can share the line and contacts with the phone. The
call can be shifted between the phone and handset.
Important: Satellite mode is available only when one handset is registered to the phone.
The following is an example of receiving an incoming call:

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