Yealink SIP-T48U Administrator's Guide

Account Settings
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Account Settings
This chapter shows you how to register accounts and configure account settings on Yealink devices.
Topics
Account Registration
Outbound Proxy in Dialog
Server Redundancy
SIP Server Name Resolution
Static DNS Cache
Logon Wizard
Multiple Line Keys per Account
Account Registration
Registering an account makes it easier for the phones to receive an incoming call or dial an outgoing call. Yealink
phone supports registering multiple accounts on a phone (T19(P) E2 phones only support registering one SIP
account; CP920 phones support one SIP/cloud account or two PSTN accounts); each account requires an exten-
sion or phone number.
Topics
Supported Accounts
SIP Accounts Registration Configuration
PSTN Account Configuration
Registration Settings Configuration
Supported Accounts
The number of registered accounts must meet the following:
Phone Model Accounts
T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G <=16
T53W/T53/T43U/T42U/T42S/T42G <=12
T41P/T41S/T27G <=6
T40P/T40G/T23P/T23G <=3
T21(P) E2 <=2
T19(P) E2 1
CP920
1 (SIP/Cloud account)
<=2 (PSTN account)
SIP Accounts Registration Configuration
The following table lists the parameters you can use to register SIP accounts.
Parameter
account.X.enable
[1]
<MAC>.cfg
Description
It defines the activation status of the account.
Permitted
Values
0-Disabled
1-Enabled

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