Yealink SIP-T48U Administrator's Guide

Audio Features
150
pstn.account.1.ring_type = Common
It means PSTN account 1 will use the ring tone selected for the IP phone configured by the parameter
“phone_setting.ring_type”.
Permitted
Values
Common, Ring1.wav, Ring2.wav, Ring3.wav, Ring4.wav, Ring5.wav, Ring6.wav, Ring7.wav,
Ring8.wav, Silent.wav, Splash.wav or custom ring tone name (for example, Customring.wav)
Default
Common
Supported
Devices
CP920
Web UI
Account > Basic > Ring Type
Phone UI
Menu > Settings > Basic Settings > Sound > Ring Tones > PSTN Account X
Parameter
ringtone.url <y0000000000xx>.cfg
Description
It configures the access URL of the custom ring tone file.
Permitted
Values
URL within 511 characters
Default
Blank
Web UI
T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U:
Settings > Preference > Upload Ringtone > Custom Ring > Upload Ringtone
Other Phones:
Settings > Preference > Upload Ringtone
Parameter
ringtone.delete <y0000000000xx>.cfg
Description
It deletes all custom ring tone files.
Permitted
Values
http://localhost/all
Default
Blank
Parameter
phone_setting.ringing_timeout <y0000000000xx>.cfg
Description
It configures the duration time (in seconds) in the ringing state.
If it is set to 180, the phone will stop ringing if the call is not answered within 180 seconds.
Permitted
Values
Integer from 1 to 3600
Default
120
Parameter
phone_setting.ring_for_tranfailed <y0000000000xx>.cfg
Description
It configures the ring tone when the phone fails to transfer a call and display "Transfer failed" on the
screen.
Permitted
Values
Ring1.wav, Ring2.wav, Ring3.wav, Ring4.wav, Ring5.wav, Ring6.wav, Ring7.wav, Ring8.wav,
Silent.wav or Splash.wav
Default
Ring1.wav
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2; for T19(P) E2/CP920, X=1.

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