User's Manual

Configuration Result Idle Screen Security Icon
Display
No – if fall back to TCP
occurs
UDP + TCP + TLS Connection is established
using
TCP or TLS, potentially
falling back to using only
UDP.
Yes – only if TLS connection
is established
No – if fall back to TCP or
UDP occurs
None : unsupported Unsupported Unsupported
Unsupported configurations cannot be saved. If the configurations are unsupported, the IP
Deskphone displays an error message.
The following is an example of an error message for unsupported configurations:
Unsupported: UDP + TLS
Unsupported: No protocols enabled.
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 32: Registration results based on configuration
Configura
tion
Description Expected result Possible results
IP
Deskphon
e: 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
Deskphon
e: UDP
Server:
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
Security
212 SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012
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