Yealink SIP-T52S Administrator's Guide

Configuring Basic Features
381
Parameters
Permitted Values
Default
a busy signal (configured by the parameter “features.normal_refuse_code”) while during a
call.
If it is set to 1 (Enabled), the LCD screen will present a new incoming call while during a call.
In both cases, users can put an active call on hold to make outgoing calls.
Web User Interface:
Features->General Information->Call Waiting
Phone User Interface:
Menu->Features->Call Waiting->Call Waiting
call_waiting.tone
0 or 1
1
Description:
Enables or disables the IP phone to play the call waiting tone when the IP phone receives an
incoming call during a call.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the IP phone will perform an audible indicator when receiving a
new incoming call during a call.
Note: It works only if the value of the parameter “call_waiting.enable” is set to 1 (Enabled).
Web User Interface:
Features->Audio->Call Waiting Tone
Phone User Interface:
Menu->Features->Call Waiting->Play Tone
call_waiting.on_code
String within 32 characters
Blank
Description:
Configures the call waiting on code to activate the server-side call waiting feature. The IP
phone will send the call waiting on code to the server when you activate call waiting feature
on the IP phone.
Example:
call_waiting.on_code = *71
Web User Interface:
Features->General Information->Call Waiting On Code
Phone User Interface:
Menu->Features->Call Waiting->On Code
call_waiting.off_code
String within 32 characters
Blank

Yealink SIP-T52S Specifications

General

Touchscreen	-
Display diagonal	2.8 \
Backlight display	Yes
Display resolution	320 x 240 pixels
Lines quantity	16 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
AC adapter input voltage	100 - 240 V
Bluetooth version	2.1+EDR
Security algorithms	802.1x RADIUS, HTTPS, MD5
Ethernet LAN interface type	Gigabit Ethernet
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Voice codecs	G.722, G.723, G.723.1, G.726, OPUS, iLBC
Volume control	Digital
Operating temperature (T-T)	-10 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Front camera	No
Operating system installed	Linux

Weight and Dimensions

Depth	212 mm
Width	211.6 mm
Height	166.8 mm