Yealink SIP-T54S, Administrator'S Manual

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Configuring Security Features
939
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DES-CBC3-SHA
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DES-CBC3-MD5
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DHE-RSA-AES128-SHA
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DHE-DSS-AES128-SHA

AES128-SHA

RC2-CBC-MD5

IDEA-CBC-SHA

DHE-DSS-RC4-SHA

RC4-SHA

RC4-MD5

RC4-64-MD5
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EXP1024-DHE-DSS-DES-CBC-SHA

EXP1024-DES-CBC-SHA

EDH-RSA-DES-CBC-SHA

EDH-DSS-DES-CBC-SHA

DES-CBC-SHA

DES-CBC-MD5

EXP1024-DHE-DSS-RC4-SHA

EXP1024-RC4-SHA

EXP1024-RC4-MD5

EXP-EDH-RSA-DES-CBC-SHA

EXP-EDH-DSS-DES-CBC-SHA

EXP-DES-CBC-SHA

EXP-RC2-CBC-MD5

EXP-RC4-MD5
The following figure illustrates the TLS messages exchanged between the IP phone and TLS
server to establish an encrypted communication channel:
Step1:
IP phone sends “Client Hello” message proposing SSL options.
Step2:
Server responds with “Server Hello” message selecting the SSL options, sends its public
key information in “Server Key Exchange” message and concludes its part of the negotiation