How do I connect with Robotics modems?

I have 2 LANs, each with 2 Windows 2000 Servers. Distance between sites is ~3Km. I installed an analog leased line. I also have 2 US Robotics Courier V. Everything External Plug and Play modems (they suport leased lines).
I don’t know how to make them work.

Question: Can someone please tell me:
– DIP switch positions on modems
– modem init strings
– if this line is what I need
– what I use on servers to connect the LANs
– servers configuration

PS: I used RRAS with DOD interface butfor some strange reason it didn’t work. So tell me what to do or what I do wrong!