Yealink SIP-T52S Administrator's Guide

Configuring Advanced Features
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3. Enter the desired time in the Update Time Interval(Seconds) field.
4. Click Confirm to accept the change.
Lightweight Directory Access Protocol (LDAP)
LDAP is an application protocol for accessing and maintaining information services for the
distributed directory over an IP network. IP phones can be configured to interface with a
corporate directory server that supports LDAP version 2 or 3. The following LDAP servers are
supported:
 Microsoft Active Directory
 Sun ONE Directory Server
 Open LDAP Directory Server
 Microsoft Active Directory Application Mode (ADAM)
The biggest plus for LDAP is that users can access the central LDAP directory of the corporation
using IP phones. Therefore they do not have to maintain the directory locally. Users can search
and dial out from the LDAP directory, and save LDAP entries to the local directory. LDAP entries
displayed on the IP phone are read only, which cannot be added, edited or deleted by users.
When an LDAP server is properly configured, the IP phone can look up entries from the LDAP
server in a wide variety of ways. The LDAP server indexes all the data in its entries, and “filters”
can be used to select the desired entry or group, and return the desired information.
Configurations on the IP phone limit the amount of the displayed entries when querying from
the LDAP server, and decide how attributes are displayed and sorted.
You can set a DSS key to be an LDAP key, and then press the LDAP key to enter the LDAP
search screen when the IP phone is idle.

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