Yealink SIP-T52S Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
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Parameters
Permitted Values
Default
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Note: DNSTTL, Registration and duration mode can only be processed when the IP phone is
idle (that is, no incoming/outbound calls, no active calls or meetings, etc.).
Web User Interface:
None
Phone User Interface:
None
account.X.sip_server.Y.failback_timeout
(X ranges from 1 to 16, Y ranges from 1 to 2)
0, Integer from
60 to 65535
3600
Description:
Configures the timeout (in seconds) for the phone to retry to send requests to the primary
server after failing over to the current working server for account X.
If you set the parameter to 0, the IP phone will not send requests to the primary server until
a failover event occurs with the current working server.
If you set the parameter from 1 to 59, the timeout will be 60 seconds.
X ranges from 1 to 16 (for SIP-T54S/T48G/T48S/T46G/T46S/T29G)
X ranges from 1 to 12 (for SIP-T52S/T42G/T42S)
X ranges from 1 to 6 (for SIP-T41P/T41S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Note: It works only if the value of the parameter “account.X.sip_server.Y.failback_mode” is
set to 3 (duration).
Web User Interface:
None
Phone User Interface:
None
account.X.sip_server.Y.failback_subscribe.enable
0 or 1
0
Description:
Enables or disables the IP phone to retry to re-subscribe after registering to the secondary
server with different IP address for account X when encountering a failover.
0-Disabled
1-Enabled

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