Avaya 1230 - Page 291

Registration behavior based on configuration settings
The following table describes the behavior of the IP Deskphone when the IP Deskphone is
configured to communicate with a server using specific protocols.
Table 89: Registration results based on configuration
Configuration Description Expected result Possible results
IP Deskphone: UDP +
TCP Server: UDP +
TCP + TLS
The IP Deskphone
allows protocols
enabled for
communication with the
server.
The IP Deskphone
establishes a
connection to the
server using TCP.
If the server does not accept
incoming requests on TCP, it
takes approximately thirty
seconds for the initial
connection attempt to fail, and
then the IP Deskphone
attempts to contact the server
using UDP. If this connection
also fails, the IP Deskphone
waits a configured period of
time before attempting to
reconnect.
IP Deskphone: UDP
Server: UDP + TCP +
TLS
The IP Deskphone only
has UDP enabled for
sending requests to the
server.
The IP Deskphone
registers using UDP
as the protocol.
If the IP Deskphone is unable to
contact the server, it waits a
configured period of time before
attempting to reconnect.
IP Deskphone: TCP
only Server: UDP +
TCP + TLS
The IP Deskphone only
has TCP enabled for
sending requests to the
server.
The IP Deskphone
registers using TCP
as the protocol.
If the IP Deskphone is unable to
contact the server, it waits a
configured period of time before
attempting to reconnect.
IP Deskphone: TLS
only Server: UDP +
TCP + TLS
The IP Deskphone only
has TLS configured for
sending requests to the
server. The IP
Deskphone must have
a device certificate
installed if the server is
configured for mutual
authentication.
The IP Deskphone
registers using SIP
over TLS. If a device
certificate is
provisioned, and the
server is configured
for mutual
authentication, then
the IP Deskphone
provides a certificate
during the TLS
handshake.
Otherwise, server-
only authentication is
used.
If the IP Deskphone is unable to
contact the server, it waits a
configured period of time before
attempting to reconnect.
UDP + TLS:
unsupported
Unsupported Unsupported Unsupported
Table continues…
TCP/TLS operation overview
March 2015 SIP Software for Avaya 1200 Series IP Deskphones-Administration 291
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