Yealink SIP-T52S Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
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Keep Mute
Keep mute, also known as persistent mute, allows you to keep the mute state of your phone
persist across calls. Once the keep mute feature is enabled, you can activate the mute feature
by pressing the MUTE key in an idle state or any other states (for SIP-T23P/T23G/T21(P) E2 IP
phones, you can only activate the mute feature by pressing the Cancel key on idle/pre-
dialing/dialing/ringing/calling/talking screen).
By default, the mute feature is automatically deactivated when the active call ends. When you
enable keep mute feature and activate the mute feature, the phone stays in the mute state until
you press the MUTE key again or until the phone restarts.
Note
Procedure
Keep mute can be configured using the configuration files.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure keep mute feature.
Parameter:
features.keep_mute.enable
Details of Configuration Parameter:
Parameter
Permitted Values
Default
features.keep_mute.enable
0 or 1
0
Description:
Enables or disables the keep mute feature for the IP phone.
0-Disabled
1-Enabled
If it is set to 0 (Disabled), mute feature is automatically deactivated when the active call
ends.
If it is set to 1 (Enabled), the mute state can be kept across calls after the mute feature is
activated until you manually deactivate the mute feature or the phone restarts.
Note: If it is set to 1 (Enabled), you cannot customize the Cancel key for SIP-
T23P/T23G/T21(P) E2 IP phones, or the Mute key for SIP-
T54S/T52S/T48G/T48S/T46G/T46S/T42G/T42S/T41P/T41S/T40P/T40G/T29G/T27P/T27G/T19
(P) E2/CP860/CP920 IP phones. It works only if the value of the parameter
“features.allow_mute” is set to 1 (Enabled).
For SIP-T23P/T23G/T21(P) E2 IP phones, the Cancel key can be used to cancel actions, reject
incoming calls, mute/un-mutes calls or activate the mute feature. If keep mute feature is
enabled, the Cancel key can only be used as a mute key.

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