Yealink T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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Transport Layer Security (TLS)
TLS is a commonly-used protocol for providing communications privacy and managing the security of
message transmission, allowing IP phones to communicate with other remote parties and connect to the
HTTPS URL for provisioning in a way that is designed to prevent eavesdropping and tampering.
Yealink IP phones support TLS version 1.0, 1.1 and 1.2. When TLS is enabled for an account, the SIP
message of this account will be encrypted, and a lock icon appears on the LCD screen after the successful
TLS negotiation.
Topics
Supported Cipher Suites
Supported Trusted and Server Certificates
TLS Configuration
Supported Cipher Suites
A cipher suite is a named combination of authentication, encryption, and message authentication code
(MAC) algorithms used to negotiate the security settings for a network connection using the TLS/SSL
network protocol.
Yealink IP phones support the following cipher suites:
 DHE-RSA-AES256-SHA
 DHE-DSS-AES256-SHA
 AES256-SHA
 EDH-RSA-DES-CBC3-SHA
 EDH-DSS-DES-CBC3-SHA
 DES-CBC3-SHA
 DES-CBC3-MD5
 DHE-RSA-AES128-SHA
 DHE-DSS-AES128-SHA
 AES128-SHA
 RC2-CBC-MD5
 IDEA-CBC-SHA
 DHE-DSS-RC4-SHA
 RC4-SHA
 RC4-MD5
 RC4-64-MD5
 EXP1024-DHE-DSS-DES-CBC-SHA

Yealink T40G Specifications

General

SIP Accounts	3
Wall Mountable	Yes
Opus Codec	No
Display	2.3 inch 132x64-pixel graphical LCD
Network	Dual-port Gigabit Ethernet
PoE	Yes
Headset Support	Yes, RJ9 port
Power Adapter	Optional
Voice Codecs	G.722, G.711(A/μ), G.729AB, G.726
Local Phonebook	1000 entries