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4.2.1 Layer2 Interface 
Click Advanced Setup > Layer2 Interface to enter the Layer2 Interface screen. 
This router provides two kinds of Layer2 Interface:   
- ATM Interface for ADSL broadband Internet service   
- ETH Interface for connecting to the Internet via an Ethernet cable.   
By default, system applies the ATM Interface (ADSL uplink). 
If you directly connect to the ADSL line via a phone cable, first refer to To Set up the ATM interface and then skip to 
To Set up WAN Service for ATM Interface.   
Or if you connect to the Internet via a fiber/cable modem using an Ethernet cable, first refer to To Set up the ETH 
interface and then skip to To Set up WAN Service for ETH Interface.   
 
To Set Up the ATM Interface 
Select ATM Interface and click Add.