Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Description
It enables or disables the call waiting feature.
Permitted
Values
0-Disabled, a new incoming call is automatically rejected by the phone with a busy message during a
call.
1-Enabled, the phone screen will present a new incoming call during a call.
Default
1
Web UI
Features > General Information > Call Waiting
Phone UI
Menu > Features > Call Waiting > Call Waiting
Parameter
call_waiting.tone <y0000000000xx>.cfg
Description
It enables or disables the phone to play the call waiting tone when the phone receives an incoming
call during a call.
Note: It works only if “call_waiting.enable” is set to 1 (Enabled).
Permitted
Values
0-Disabled
1-Enabled
Default
1
Web UI
Features > Audio > Call Waiting Tone
Phone UI
Menu > Features > Call Waiting > Play Tone
Parameter
call_waiting.on_code <y0000000000xx>.cfg
Description
It configures the call waiting on code.
The phone will send the code to activate call waiting on server-side when you activate it on the
phone.
Permitted
Values
String within 32 characters
Default
Blank
Web UI
Features > General Information > Call Waiting On Code
Phone UI
Menu > Features > Call Waiting > On Code
Parameter
call_waiting.off_code <y0000000000xx>.cfg
Description
It configures the call waiting off code.
The phone will send the code to deactivate call waiting on server-side when you deactivate it on the
phone.
Permitted
Values
String within 32 characters
Default
Blank
Web UI
Features > General Information > Call Waiting Off Code
Phone UI
Menu > Features > Call Waiting > Off Code
Do Not Disturb (DND)
DND feature enables the phone to reject all incoming calls automatically when you do not want to be interrupted.
You can choose to implement DND locally on the phone or on the server-side.

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