User's Manual

Figure 36: 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.
Configuration
Result Idle Screen Security Icon
Display
Default: UDP + TCP SIP is unsecured. No
UDP only SIP is unsecured. No
TCP only SIP is unsecured. No
TLS only Connection is only
established if SIP is secure.
Yes
UDP + TLS: unsupported Unsupported. Unsupported
TCP + TLS Connection is established
with either TCP or TLS.
Yes – only if TLS connection
is used
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
Security
232 SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012
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