Chapter 23: SIP messages supported by
the IP Deskphone
SIP methods
The table below provides a list of SIP messages supported by the Avaya 1200 Series IP
Deskphone.
Table 69: SIP methods
Method Supported? Comments
INVITE Yes Mid-call re-invites for media changes also supported.
ACK Yes
BYE Yes
CANCEL Yes
OPTIONS Response only
INFO Yes Optionally used for in-session DTMF signaling, and Avaya Call
Server specific NAT detection
PING Yes Proxy detection, monitoring and Avaya Call Server specific firewall
traversal
REGISTER Yes For user registration
REFER Yes For transfer
NOTIFY Yes
SUBSCRIBE Yes
PUBLISH Yes For VQMon Publish
PRACK Yes No support for PRACK-specific early-media negotiation scenarios
MESSAGE Yes
UPDATE Yes UPDATE messages received in an early dialog state require reliable
provisional responses. If PRACK is disabled, or not used by a local
or remote party, some UPDATE operations fail as described in
RFC3311. The support of UPDATE messages is not a configurable
feature.
228 SIP Software for Avaya 1200 Series IP Deskphones-Administration March 2015
Comments? infodev@avaya.com
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