Yealink SIP-T48U Administrator's Guide

Audio Features
162
Default
Blank
Web UI
Settings > Tones > Busy
Parameter
voice.tone.congestion <y0000000000xx>.cfg
Description
It customizes the tone when the network is congested.
The value format is Freq/Duration. For more information on the value format, refer to the parameter
“voice.tone.dial”.
Note: It works only if “voice.tone.country” is set to Custom. If you want to disable this warning tone, set
it to 0.
Permitted
Values
String
Default
Blank
Web UI
Settings > Tones > Congestion
Parameter
features.congestion_tone.codelist <y0000000000xx>.cfg
Description
It configures the return code to play the congestion tone.
Multiple codes are separated by commas.
Example:
features.congestion_tone.codelist = 403,503,603
Note: The congestion tone can be customized by "voice.tone.congestion".
Permitted
Values
any code that the server can return
Default
Blank
Parameter
voice.tone.callwaiting <y0000000000xx>.cfg
Description
It customizes the call waiting tone.
The value format is Freq/Duration. For more information on the value format, refer to the parameter
“voice.tone.dial”.
Note: It works only if “voice.tone.country” is set to Custom. If you want to disable this warning tone, set
it to 0.
Permitted
Values
String
Default
Blank
Web UI
Settings > Tones > Call Waiting
Parameter
voice.tone.dialrecall <y0000000000xx>.cfg
Description
It customizes the callback tone.
The value format is Freq/Duration. For more information on the value format, refer to the parameter
“voice.tone.dial”.
Note: It works only if “voice.tone.country” is set to Custom. If you want to disable this warning tone, set
it to 0.
Permitted
Values
String
Default
Blank

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