Yealink SIP-T52S Administrator's Guide

Appendix
1061
6xx Response
Supported
Notes
603 Decline
Yes
604 Does Not Exist Anywhere
No
606 Not Acceptable
No
SIP Session Description Protocol (SDP) Usage
SDP Headers
Supported
v—Session Description Protocol Version
Yes
o—Owner/Creator, Session Id
Yes
a—Media Attribute
Yes
c—Connection Information
Yes
b—Bandwidth Information
Yes
m—Media Description, name and
address
Yes
s—Session Name
Yes
t—Time Description, active time
Yes
Appendix I: SIP Call Flows
SIP uses six request methods:
INVITE—Indicates a user is being invited to participate in a call session.
ACK—Confirms that the client has received a final response to an INVITE request.
BYE—Terminates a call and can be sent by either the caller or the callee.
CANCEL—Cancels any pending searches but does not terminate a call that has already been
accepted.
OPTIONS—Queries the capabilities of servers.
REGISTER—Registers the address listed in the To header field with a SIP server.
The following types of responses are used by SIP and generated by the IP phone or the SIP
server:
SIP 1xx—Provisional Responses
SIP 2xx—Successful Responses
SIP 3xx—Redirection Responses
SIP 4xx—Request Failure Responses

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