Sip Request - Yealink SIP-T48G Administrator's Manual

SIP Responses

SIP Session Description Protocol (SDP) Usage

The following SIP request messages are supported:
Method
REGISTER
INVITE
ACK
CANCEL
BYE
OPTIONS
SUBSCRIBE
NOTIFY
REFER
PRACK
INFO
MESSAGE
UPDATE
PUBLISH
The following SIP request headers are supported:
Note In the following table, a "Yes" in the Supported column means the header is sent and
properly parsed.
Supported
Yes
Yealink IP phones support
mid-call changes such as
placing a call on hold as
Yes
signaled by a new INVITE
that contains an existing
Call-ID.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Appendix
Notes
261