Yealink SIP-T48G Administrator's Manual page 670

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Details of Configuration Parameters:
network.ip_address_mode
Description:
Configures the IP address mode.
0-IPv4
1-IPv6
2-IPv4 & IPv6
Note: If you change this parameter, the IP phone will reboot to make the change
take effect.
Web User Interface:
Network->Basic->Internet Port->Mode (IPv4/IPv6)
Phone User Interface:
Menu->Settings->Advanced Settings (default password: admin)
->Network->WAN Port->IP Mode
network.ipv6_internet_port.type
Description:
Configures the Internet (WAN) port type for IPv6.
0-DHCP
1-Static IP Address
Note: It works only if the value of the parameter "network.ip_address_mode" is set
to 1 (IPv6) or 2 (IPv4 & IPv6). If you change this parameter, the IP phone will reboot
to make the change take effect.
Web User Interface:
Network->Basic->IPv6 Config
Phone User Interface:
Menu->Settings->Advanced Settings (default password: admin)
->Network->WAN Port->IPv6
network.ipv6_static_dns_enable
Description:
650
Parameters
Configure the IPv6 static DNS
address.
Permitted Values
0, 1 or 2
0 or 1
0 or 1
Default
0
0
0