SDP and Call Hold
The IP Deskphone can support sending and receiving of hold using the method specified by
RFC2543 and RFC3261/3264.
Transport layer protocols
Protocol Supported?
Unicast UDP Yes
Multicast UDP No
TCP No
SIP security authentication
Authentication Supported? Comments
Digest Authentication Yes
Proxy-to-User Authentication Yes
User-to-User Authentication No The IP Deskphone responds to a 401,
but never challenges incoming
requests with a 401 response.
S/MIME No
AKA No
SIP DTMF Digit transport
Transport type Supported?
RFC2833 Yes
In-band tones Yes
Out-of-band tones Yes (vnd.avaya.digits)
SIP messages supported by the IP Deskphone
236 SIP Software for Avaya 1200 Series IP Deskphones-Administration March 2015
Comments? infodev@avaya.com
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