Yealink T40G Administrator's Guide

Phone Network
43
VPN Files
Description
Unified Directories
client.crt
Client certificate
/config/openvpn/keys/client.crt
client.key
Private key of the client
/config/openvpn/keys/client.key
VPN Configuration
The following table lists the parameters you can use to configure VPN.
Parameter
static.network.vpn_enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the OpenVPN feature on the IP phone.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Network->Advanced->VPN->Active
Phone UI
T54S/T52S/T48S/T48G/T46S/T46G/T29G:
Menu->Advanced (default password: admin) ->Network->VPN->VPN Active
T42G/T42S/T41P/T41S/T40P/T40G/T27P/T27G/T23P/T23G/T21(P) E2/T19(P) E2:
Menu->Settings->Advanced Settings (default password: admin)
->Network->VPN->VPN Active
Parameter
static.openvpn.url
<y0000000000xx>.cfg
Description
It configures the access URL of the *.tar file for OpenVPN.
Example:
static.openvpn.url = http://192.168.10.25/OpenVPN.tar
Permitted
Values
URL within 511 characters
Default
Blank
Web UI
Network->Advanced->VPN->Upload VPN Config
[1]
If you change this parameter, the IP phone will reboot to make the change take effect.
Quality of Service (QoS)
VoIP is extremely bandwidth and delay-sensitive. QoS is a major issue in VoIP implementations,
regarding how to guarantee that packet traffic not be delayed or dropped due to interference from other
lower priority traffic. VoIP can guarantee high-quality QoS only if the voice and the SIP packets are given
priority over other kinds of network traffic. IP phones support the DiffServ model of QoS.

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