Sindoh M612 - Manual (Page 194)

Settings and changes of each function and additional functions
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4 Press the right side menu of IP Address Setting to select DHCP [Auto Setting] or Static [Manual Setting]
① [Auto Settings]: Select [DHCP] and then press 【Save】] button.
② [Manual Settings] : Select [ Manual setting ] and enter the IP address, netmask and gateway, 1st, 2nd
DNS Address and then press 【Save】.
(Must enter all addresses to make the setting and all 12 digit addresses.)