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Yealink SIP-T52S User Manual

Yealink SIP-T52S
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Customizing Your Phone
51
Procedure:
1. Navigate to Menu->Features->Others->General.
2. Select # or * from the Key As Send field, or select Disabled to disable this feature.
3. Press Save.
Key as send is configurable via web user interface at the path Features->General Information.
Phone Lock
You can lock your phone temporarily when you are not using it. This feature helps to protect
your phone from unauthorized use.
The phone lock consists of the following:
Menu Key: The Menu soft key is locked. You cannot access the menu of the
phone until unlocked.
Function Keys: The function keys are locked. You cannot use the MESSAGE, REDIAL,
HOLD, MUTE, TRANSFER, OK, Cancel, navigation keys and soft keys
until unlocked.
All Keys: All keys are locked except the Volume key, digit keys, # key, * key,
HEADSET key and Speakerphone key. You are only allowed to dial
emergency numbers, reject incoming calls by pressing the Cancel key
or the Reject soft key, answer incoming calls by lifting the handset,
pressing the Speakerphone key, the HEADSET key, the OK key or the
Answer soft key, and end the call by hanging up the handset,
pressing the Speakerphone key, the End Call soft key or the Cancel
key.
Emergency Number
Public telephone networks in countries around the world have a single emergency telephone
number (emergency services number), that allows a caller to contact local emergency services
for assistance when necessary. The emergency telephone number may differ from country to
country. It is typically a three-digit number so that it can be easily remembered and dialed
quickly. Some countries have a different emergency number for each of the different emergency
services. The emergency number setting, if desired, must be made before lock activation. For

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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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