Welltech WG2504 FXS V.4.02 - Manual (Page 15)

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LAN Setting:

Management mode: This LAN port is used for management purpose,
not used for register or routing.
 NAT mode: DHCP function on the LAN port. The LAN ports will function
as a DHCP server, network devices connected to them will be issued with
IP addresses. (On the lift item will add a NAT setting, the information
please refer NAT setting)

IP Address : IP address (please set to 192.168.x.x if your WAN port is
using 10.x.x.x IP segment).
 Netmask: IP network mask
 Bridge mode: At this mode, both WAN and LAN ports are configured to
Switch/Hub features. LAN port access to WAN port directly.
Note: default LAN IP address is 192.168.123.123
DDNS (DynDNS) Setting:

DDNS (DynDNS): enable or disable dynamic DNS feature.
 Domain Name: input your Domain Name
 User Name: input your user name
 Password: input your password