Yealink SIP-T52S Administrator's Guide

Configuring Basic Features
543
Parameter
Permitted Values
Default
Web User Interface:
None
Phone User Interface:
None
Intercom
Intercom allows establishing an audio conversation directly. The IP phone can answer intercom
calls automatically. This feature depends on support from a SIP server.
Outgoing Intercom Calls
Intercom is a useful feature in office environments to quickly connect with an operator or
secretary. Users can press an intercom key to automatically initiate an outgoing intercom call
with a remote extension.
Intercom can be also used to monitor a specific user for status changes on IP phones. For
example, you can configure an intercom key on a supervisor’s phone to monitor the IP phone
user status (busy or idle). When the monitored user places a call, a busy indicator on the
supervisor’s phone indicates that the user’s phone is in use. When the monitored user is idle,
the supervisor can press the intercom key to automatically connect with a preconfigured target
extension for outgoing intercom calls. When the monitored user receives an incoming call, the
supervisor can press the intercom key to pick up the call directly. To pick up the call, you have
to configure the directed call pickup code in advance. You can configure the directed call
pickup code when configuring an intercom key. IP phones support this feature using a
SUBSCRIBE/NOTIFY mechanism as specified in RFC 3265. This feature depends on support from
a SIP server.
Line key/Expansion Module Key LED (configured as an intercom key)
LED Status
Description
Solid green
The monitored user is idle.
Fast-flashing red (200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is dialing.
The monitored user is talking.
Off
The monitored user does not exist.

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