You can use the Intel® Command Line Interface (CLI). You'll need another PC (other than the servers you want to manage) to install it. Then you can telnet to that PC, and then connect to the managed server using CLI. See the user manual for more details. The SOL White Paper is also a good reading.
Note that SOL works in text mode only. If you want a complete remote KVM solution, you can check the Remote Management Module. (not available on all server boards)