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Yealink SIP-T52S Administrator's Guide

Yealink SIP-T52S
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Configuring Basic Features
409
5. Press or to scroll to the Send Rejection Code field.
6. (Optional.) Press or to select the desired value from the Send Rejection Code
field.
7. (Optional.) Enter the anonymous call rejection on code and off code respectively in the On
Code and Off Code field.
8. Press the Save soft key to accept the change.
Do Not Disturb (DND)
DND allows IP phones to ignore incoming calls. Incoming calls received while DND is activated
are logged in the Missed Calls list. DND feature can be configured on a phone or a per-line
basis depending on the DND mode. Two DND modes:
Phone (default): DND feature is effective for the IP phone.
Custom: DND feature can be configured for each or all accounts.
The DND feature is enabled by default, and you have the option of disabling it (not applicable
to CP860 IP phones). Users have no permission to configure DND on the phone if DND feature
is disabled. When DND is enabled, it can be activated locally through the phone or through a
server. A user can activate or deactivate DND using the DND key or DND soft key on the
phone. The server-side DND feature deactivates the local DND and call forward settings. If the
server-side DND feature is activated on any of the IP phones registrations, the other
registrations are not affected. For more information on call forward, refer to Call Forward on
page 445.
The DND on code and DND off code configured on IP phones are used to activate/deactivate
the server-side DND feature. They may vary on different servers.
Return Message When DND
This feature defines the return code and the reason of the SIP response message for the
rejected incoming call when DND is activated on the IP phone. The callers phone LCD screen
displays the received return code.
DND Emergency
This feature allows users to receive the incoming calls from some authorized numbers even if
the DND feature is activated. This feature is disabled by default.

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Yealink SIP-T52S Specifications

General IconGeneral
Touchscreen-
Display diagonal2.8 \
Backlight displayYes
Display resolution320 x 240 pixels
Lines quantity16 lines
Phonebook capacity1000 entries
Number of VoIP accounts12
AC adapter input voltage100 - 240 V
Bluetooth version2.1+EDR
Security algorithms802.1x RADIUS, HTTPS, MD5
Ethernet LAN interface typeGigabit Ethernet
USB 2.0 ports quantity1
Ethernet LAN (RJ-45) ports2
MountingDesk/Wall
Handset typeWired handset
Product typeIP Phone
Product colorBlack
Voice codecsG.722, G.723, G.723.1, G.726, OPUS, iLBC
Volume controlDigital
Operating temperature (T-T)-10 - 40 °C
Operating relative humidity (H-H)10 - 95 %
Cables includedLAN (RJ-45)
Number of handles included1 pc(s)
Front cameraNo
Operating system installedLinux
Weight and Dimensions IconWeight and Dimensions
Depth212 mm
Width211.6 mm
Height166.8 mm

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