Yealink SIP-T52S Administrator's Guide

Configuring Advanced Features
771
Parameters
Permitted Values
Default
dns_cache_naptr.1.service = SIP+D2T
Note: For more information, refer to RFC 2915.
Web User Interface:
None
Phone User Interface:
None
dns_cache_naptr.X.ttl
(X ranges from 1 to 12)
Integer from 30 to
2147483647
300
Description:
Configures the time interval (in seconds) that NAPTR record X may be cached before the
record should be consulted again.
Example:
dns_cache_naptr.1.ttl = 3600
Web User Interface:
None
Phone User Interface:
None
dns_cache_srv.X.name
(X ranges from 1 to 12)
Domain name with SRV
prefix
Blank
Description:
Configures the domain name in SRV record X.
Example:
dns_cache_srv.1.name = _sip._tcp.yealink.pbx.com
Web User Interface:
None
Phone User Interface:
None
dns_cache_srv.X.port
(X ranges from 1 to 12)
Integer from 0 to 65535
0
Description:
Configures the port to be used in SRV record X.
Example:

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