On the system you've installed OpenACD onto, log into the web ui as an agent by going to the URL http://your-server-name:5050. Once in log into web ui, you will be able to sign in and out to take calls. To actually get calls from FreeSWITCH media server to your phone, you must specify
VoIP Endpoint: PSTN Number
VoIP Endpoint Data: Your full sip uri
NOTE: Make sure your FQDN that you enter for your sip uri matches your domain name (sipXconfig UI > System > Domain > Domain name). If it doesn't you will get an UNALLOCATED_NUMBER error from Freeswitch.
Place a call to into from any other phone than 201. You should here your welcome message, then the guitar music in FreeSWITCH. Now from the agent web ui "Go Avaliable"