HELP - URGENT

We installed 3 Moxa C168H/PCI for dialin connect internet through ether1. How do we configure them together? Using ppp like C168H/PCI with ether1 is not explained in the manual. NEED HELP

Have you red the following?
http://www.mikrotik.com/docs/ros/2.8/interface/ppp

The document does not discuss on how to connect ppp to interface like ether or wireless. if you configure the dialin as ppp-client, what will you configure as ppp-server when you plan to use ether1 as the main interface that will give internet to the clients?

The MikroTik Router maybe?

From winbox open the “interfaces” window then from the “settings” drop down menu select PPPoE / PPTP server.. or whatever kind of PPP you want to do.