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Yealink SIP-T52S User Manual

Yealink SIP-T52S
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User Guide for T5 Series IP Phones
54
Deactivating the Phone Lock
Procedure:
1. Navigate to Menu->Basic->Phone Lock.
2. Enter the desired PIN (default PIN: 123) in the Unlock PIN field, and then press OK.
3. Select Disabled from the Lock Enable field.
4. Press Save.
Phone lock deactivation is configurable via web user interface at the path Features->Phone
Lock.
Configuring the Emergency Number
You can specify the emergency telephone numbers on the IP phone for contacting the
emergency services for assistance in case of emergency. You can dial these numbers even when
the phone is locked
Note
Procedure:
1. Click Features->Phone Lock.
2. Enter the emergency number in the Emergency field.
Contact your local phone service provider for available emergency numbers in your area.
The IP phone also supports the emergency dialplan, which allows users to make emergency calls
if the phone is locked or unregistered. For more information, contact your system administrator.

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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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