To experiment with OSIMS, you need a valid account to the P2E site.
To see how you can access the testbed and create accounts, you can watch the first tutorial http://nam.ece.upatras.gr/ppe/?q=node/9
You will need the FSToolkit to manage the experiment resources, so check the installation instructions of FSToolkit: http://nam.ece.upatras.gr/ppe/?q=node/5
Once the testbed is created, you have root access with your account.
The core is installed on one machine. There are DNS entries to access publicly (ie pcscf.ece.upatras.gr , ) or the HSS at imsserver.ece.upatras.gr. You will also have access to HSS console http://nam.ece.upatras.gr/ppe/?q=node/13
Please check the relevant component documentation from our site under the OSIMS menu.