Avaya SIP Software 4.0 for 1200 Series Bedienungsanleitung PDF herunterladen (Seite 243)

Figure 49: 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 November 2012 243

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Avaya SIP Software 4.0 for 1200 Series Bedienungsanleitung Seite 243