Yealink T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
418
 Thawte Universal CA Root
 VeriSign Class 3 Secure Server CA - G2
 VeriSign Class 3 Secure Server CA – G3
 Thawte SSL CA
 StartCom Certification Authority
 StartCom Certification Authority G2
 Starfield Services Root Certificate Authority - G2
 RapidSSL CA
 Go Daddy Root Certificate Authority - G2
 Cybertrust Global Root
 COMODOSSLCA
 COMODO RSA Domain Validation Secure Server CA
 COMODO RSA Certification Authority
 AmazonRootCA4
 AmazonRootCA3
 AmazonRootCA2
 AmazonRootCA1
 Yealink Root CA
 Yealink Equipment Issuing CA
 SIP Core
Note
Yealink endeavors to maintain a built-in list of most common used CA Certificates. Due to memory
constraints, we cannot ensure a complete set of certificates. If you are using a certificate from a commercial
Certificate Authority not in the list above, you can send a request to your local distributor. At this point, you
can upload your particular CA certificate into your phone.
TLS Configuration
The following table lists the parameters you can use to configure TLS.
Parameter
account.X.sip_server.Y.transport_type
[1]
<MAC>.cfg
Description
It configures the type of transport protocol.
Permitted
Values
0-UDP
1-TCP
2-TLS
3-DNS-NAPTR, if no server port is given, the IP phone performs the DNS NAPTR and
SRV queries for the service type and port.

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