ZyXEL Communications U-336S User Manual page 25

Figure 2-5 U-336S Modem Connections
For the U-336SA you don't need an AC adapter. Use the supplied
power cord to connect your modem to the AC power outlet.
Figure 2-6 U-336SA Modem Connections
If a leased line is not used, simply leave the connection open. There are
no DIP switches or configuration settings that you need to worry about.
Your modem comes factory pre-set and allows you to fully configure
the modem from the LCD display. User configurations are also
Installation 11