Sharmin,
The full command list is available on Quintum’s web site. Go to http://www.quintum.com, select support, then scroll down and select your model type. On the next page look for the setup documents and you should see on that is the command line reference guide. This will give you a list of all commands, but it will not give you step-by-step configuration instructions.
If you need support on configuration, you may contact me directly at mike_voip@hotmail.com.
Mike