User's Manual

Parameter name Description Default value Boundaries
incoming TLS
requests.
Disabled: 0 (must be
non-zero for a TLS-
only option)
Note:
The configuration of the IP Deskphone for various protocols must be completed for outgoing
and incoming connections. For a complete TLS-only option, the outgoing server UDP and
TCP protocols must be configured as a non-zero value, and the incoming UDP and TCP
listening ports must be configured as a non-zero value.
Using the TLS to connect to the SIP proxy
The IP Deskphone can establish a connection with the proxy after the appropriate
configurations
are made for the TLS. After the IP Deskphone registers with the SIP Proxy, the
user can detect if a secure connection is established by the presence of a security icon
(padlock) on the idle screen.
Figure 50: Security icon enabled
Note:
Connecting to the server requires that the IP Deskphone uses, at a minimum,
TLS_RSA_WITH_AES_128_CBC_SHA, and as an objective,
TLS_RSA_WITH_AES_256_CBC_SHA. Because this is a server-specific configuration, the
IP Deskphone must be prepared to handle both. There is no difference in screen indication,
regardless of the type of cipher used.
The following table describes the configurations that affect the presence of the security icon
on the idle screen of the IP Deskphone.
Security
280 SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013
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