Yealink SIP-T2 Series User Manual

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones
992
6xx Response
Supported
Notes
603 Decline
Yes
604 Does Not Exist Anywhere
No
606 Not Acceptable
No
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-T2 Series Specifications

General

Brand	Yealink
Model	SIP-T2 Series
Category	IP Phone
Language	English