Yealink SIP-T48U Administrator's Guide

Audio Features
160
Condition Description
Ring Back Ring-back tone
Busy When the callee is busy
Congestion When the network is congested
Call Wait-
ing
Call waiting tone (For more information on call waiting, refer to Call Waiting)
Dial Recall When receiving a callback
Info When receiving a special message
Stutter When receiving a voice mail (For more information on voice mail tone, refer to Alert Tone)
Message When receiving a text message (For more information on text message, refer to Alert Tone)
Auto
Answer
When automatically answering a call (For more information on the auto answer, refer to Auto Answer)
Stutter Dial When receiving a text message
Tones Configuration
The following table lists the parameters you can use to configure tones.
Parameter
voice.tone.country <y0000000000xx>.cfg
Description
It configures the country tone for the phones.
Permitted
Values
Custom, Australia, Austria, Brazil, Belgium, Chile, China, Czech, Czech ETSI, Denmark, Finland,
France, Germany, Great Britain, Greece, Hungary, Lithuania, India, Italy, Japan, Mexico, New Zea-
land, Netherlands, Norway, Portugal, Spain, Switzerland, Sweden, Russia, United States
Default
Custom
Web UI
Settings > Tones > Select Country
Parameter
voice.tone.dial <y0000000000xx>.cfg
Description
It customizes the dial tone.
tone list = element[,element] [,element]…
Where
element = [!]Freq1[+Freq2][+Freq3][+Freq4] /Duration
Freq: the frequency of the tone (ranges from 200 to 4000 Hz). If it is set to 0 Hz, it means the tone is
not played.
For T40P/T40G/T23P/T23G/T21(P) E2/T19(P) E2:
A tone is comprised of at most two different frequencies.
For other phones:
A tone is comprised of at most four different frequencies.
Duration: the duration (in milliseconds) of the dial tone, ranges from 0 to 30000ms.
You can configure at most eight different tones for one condition, and separate them by commas. (for
example, 250/200,0/1000,200+300/500,200+500+800+1500/1000).
If you want the IP phone to play tones once, add an exclamation mark “!” before tones (for example,

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