Yealink SIP-T52S Administrator's Guide

Configuring Advanced Features
759
Parameters
Permitted Values
Default
Configures the time interval (in seconds) for the IP phone to detect whether the working
outbound proxy server is available by sending the registration request after the fallback
server takes over call control.
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)
Example:
account.1.outbound_proxy_fallback_interval = 3600
Note: It is only applicable to outbound proxy servers.
Web User Interface:
Account->Register->Proxy Fallback Interval
Phone User Interface:
Menu->Advanced (default password: admin) ->Accounts->Proxy Fallback Interval
account.X.sip_server.Y.failback_mode
(X ranges from 1 to 16, Y ranges from 1 to 2)
0, 1, 2 or 3
0
Description:
Configures the failback mode for the IP phone to retry the primary server in failover for
account X.
0-newRequests: all requests are sent to the primary server first, regardless of the last server
that was used. If the primary server does not respond correctly, the IP phone will try to send
requests to the secondary server.
1-DNSTTL: the IP phone will send requests to the last registered server first. If the TTL for
the DNS A records on the registered server expires, the phone will retry to send requests to
the primary server.
2-Registration: the IP phone will send requests to the last registered server first. If the
registration expires, the phone will retry to send requests to the primary server.
3-duration: the IP phone will send requests to the last registered server first. If the time
defined by the parameter “account.X.sip_server.Y.failback_timeout” expires, the phone will
retry to send requests to the primary server.
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)

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