Yealink SIP-T48U Administrator's Guide

Getting Started
20
Getting Started
This chapter describes where Yealink devices fit in your network and provides basic initialization instructions of
devices.
Topics
Requirements
Yealink IP Phones in a Network
Initialization Process Overview
Verifying Startup
Requirements
In order to perform as SIP endpoints in your network successfully, you need the following in deployments:
l A working IP network is established.
l VoIP gateways configured for SIP.
l The latest (or compatible) firmware of the device is available.
l A call server is active and configured to receive and send SIP messages.
l A text editor, such as Notepad++, to create and edit boot files, configuration files, and resource files.
Yealink IP Phones in a Network
Most Yealink phones are connected physically through a Category 5E (CAT5E) cable to a 10/100/1000Mbps Eth-
ernet LAN, and send and receive all data using the same packet-based technology. Some phones support the wire-
less network.
Since the IP phone is a data terminal, digitized audio being just another type of data from its perspective, the phone
is capable of vastly more than traditional business phones. Moreover, Yealink phones run the same protocols as
your office personal computer, which means that you can develop many innovative applications without resorting to
specialized technology.
There are many ways to set up a phone network using Yealink phones. The following shows an example of a net-
work setup:

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