Yealink SIP-T52S Administrator's Guide

Configuring Advanced Features
743
Variable Value
Phone Action
AlwaysFwdOn/BusyFwdOn/NoAnswF
wdOn=xxx=n
Activate an always/busy/no answer forward
feature to xxx for the IP phone (“xxx” means
the destination number)
The valid value of “n” means the duration
time (seconds) before forwarding incoming
calls (n is the times of 6, e.g., 24). It is only
applicable to no answer forward feature.
Note: For Yealink IP phones (except CP860), it
works only if the value of the parameter
“features.fwd.allow” is set to 1 (Enabled) and
call forward mode is Phone, the
always/busy/no answer forward feature will
apply to all the accounts on the phone.
Example:
http://10.10.20.10/servlet?key=NoAnswFwdO
n=1001=24
AlwaysFwdOff/BusyFwdOff/NoAnswF
wdOff
Deactivate the always/busy/no answer
forward feature for the IP phone.
Note: For Yealink IP phones (except CP860), it
works only if the value of the parameter
“features.fwd.allow” is set to 1 (Enabled) and
call forward mode is Phone, the
always/busy/no answer forward feature will
apply to all the accounts on the phone.
Example:
http://10.10.20.10/servlet?key=NoAnswFwdOf
f
CALLEND/CallEnd
End a call.
ASW/CANCEL/HOLD/UNHOLD:xxx
Answer/end/hold/unhold a call (xxx refers to
the call-id of the active call).
Example:
http://10.10.20.10/servlet?key=ASW:33093
Note: To get the call-id of the active call,
configure the action URL:
http(s)://<phoneIPAddress>/help.xml?CallId=
$call_id . For more information, refer to Action
URL on page 720.
Note
The variable value is not applicable to all events. For example, the variable value “MUTE” is only
applicable when the IP phone is during a call.
When authentication is required, you can use the following URI format:
http(s)://username:password@<phoneIPAddress>/servlet?key=variable value or
http(s)://<phoneIPAddress>/servlet?key=variable value&@username:password .

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