Avaya SIP Software 3.2 for 1200 Series User Manual download pdf (Page 247)

Figure 48: 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

TCP/TLS operation overview

SIP Software for Avaya 1200 Series IP Deskphones-Administration January 2012 247

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Avaya SIP Software 3.2 for 1200 Series User Manual Page 247