Yealink SIP-T52S Administrator's Guide

Configuring Audio Features
831
Auto Answer
If the INVITE request contains the following type of strings, the IP phone will answer incoming
calls automatically without playing the ring tone:
 Alert-Info: Auto Answer
 Alert-Info: info = alert-autoanswer
 Alert-Info: answer-after = 0 (or Alert-Info: Answer-After = 0)
If enable auto answer tone feature is enabled, the phone plays a warning tone to alert the user
before answering the incoming call. For more information on enable auto answer tone, refer to
Auto Answer on page 385.
Note
Procedure
Distinctive ring tones can be configured using the following methods.
Central Provisioning
(Configuration File)
<MAC>.cfg
Configure distinctive ring tones.
Parameter:
account.X.alert_info_url_enable
<y0000000000x
x>.cfg
Configure the internal ringer text and
internal ringer file.
Parameters:
features.alert_info_tone
distinctive_ring_tones.alert_info.X.text
distinctive_ring_tones.alert_info.X.ringer
Web User Interface
Configure distinctive ring tones.
Navigate to:
http://<phoneIPAddress>/servlet?m=mod_
data&p=account-adv&q=load&acc=0
Configure the internal ringer text and
internal ringer file.
Navigate to:
http://<phoneIPAddress>/servlet?m=mod_
data&p=settings-ring&q=load
Details of Configuration Parameters:
If the Alert-Info header contains multiple types of keywords, the IP phone will process the
keywords in the following order: AutoAnswer>URL>info text/Bellcore-drN/ringtone-
N>MyMelodyN.

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