Alright there is some confusion here, so I'm going to be as thorough as possible.
Here is what I understand of your situation:
- Your ISP (Internet Service Provider) provides you with DSL internet service.
- Your ISP provides you with an on-site DSL modem
- You have some wierd router which I can't find english manuals for just yet
- You want to use your router (or a router) with your internet connection
Using your router with your ISP's modem
The simplest configuration is to use your router with your ISP's modem that they provided. I don't know if they provided you with this zaney router, but it seems too feature rich for that to be possible.
To troubleshoot it you will need to connect it in the following method
ISP > DSL Modem > WAN port on router (it looks like you have two?) > Your computers in the LAN ports
What routers do is they bridge networks. This is a step up from what switches do. Switches connect networks, however in a simplistic form they just pass traffic. In this case a router bridges your Public network access (the internet) with your Private network (if you want I can explain this further with IP addresses).
What I suspect is the problem is that your router is not getting an IP from the DSL modem. Why? Your ISP may have assigned your IP to a single MAC address. If you go into the web interface for the router, once it's connected of course, and find the WAN port you plugged your modem into, it will list IP information about that connection. If it has an IP address of 0.0.0.0 or 169.264.x.x then your ISP is not providing you with a working IP address.
You will need to call them to correct this. They can also further troubleshoot with you.
Alternatively you could purchase a more simple router, such as something by ASUS, but the router you have looks like it is rather high quality, I would work with it.