Yealink T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
10
Port->IPv4->DHCP IPv4 Client->Static DNS (Enabled) ->Pri.DNS
Parameter
static.network.secondary_dns
[1]
<y0000000000xx>.cfg
Description
It configures the secondary IPv4 DNS server.
Example:
static.network.secondary_dns = 202.101.103.54
Note: It works only if “static.network.ip_address_mode” is set to 0 (IPv4) or 2 (IPv4 &
IPv6). In DHCP environment, you also need to make sure
“static.network.static_dns_enable" is set to 1 (On).
Permitted
Values
IPv4 Address
Default
Blank
Web UI
Network->Basic->IPv4 Config->Static IP Address->Secondary DNS
Phone UI
T54S/T52S/T48S/T48G/T46S/T46G/T29G:
Menu->Advanced (default password: admin)->Network->WAN Port->IPv4->Static
IP->Secondary DNS
Or Menu->Advanced (default password: admin)->Network->WAN
Port->IPv4->DHCP->Static DNS (Enabled) ->Secondary DNS
T42G/T42S/T41P/T41S/T40P/T40G/T27P/T27G/T23P/T23G/T21(P) E2/T19(P) E2:
Menu->Settings->Advanced Settings (default password: admin)->Network->WAN
Port->IPv4->Static IPv4 Client->Sec.DNS
Or Menu->Settings->Advanced Settings (default password: admin)->Network->WAN
Port->IPv4->DHCP IPv4 Client->Static DNS (Enabled) ->Sec.DNS
[1]
If you change this parameter, the IP phone will reboot to make the change take effect.
IPv6 Configuration
If you configure the network settings on the phone for an IPv6 network, you can set up an IP address for
the phone by using SLAAC (ICMPv6), DHCPv6 or by manually entering an IP address. Ensure that your
network environment supports IPv6. Contact your ISP for more information.
When you enable both SLAAC and DHCPv6 on the phone, the server can specify the IP phone to obtain
the IPv6 address and other network settings either from SLAAC or from DHCPv6, if the SLAAC server is
not working, the IP phone will try to obtain the IPv6 address and other network settings via DHCPv6.
The following table lists the parameters you can use to configure IPv6.
Parameter
static.network.ipv6_internet_port.type
[1]
<y0000000000xx>.cfg
Description
It configures the Internet port type for IPv6.
Note: It works only if “static.network.ip_address_mode” is set to 1 (IPv6) or 2 (IPv4 &
IPv6).

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