Yealink SIP-T2 SERIES Administrator's Manual page 993

Method
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.
Method
Accept
Alert-Info
Allow
Allow-Events
Authorization
Call-ID
Call-Info
Contact
Supported
signaled by a new INVITE
that contains an existing
Call-ID.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Supported
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Appendix
Notes
Notes
971