Do yourself a favor (seriously):
1) get an old P4 RIGHT NOW and install vicidial in it for testing (download vicibox from vicibox.com, free, and the manual for installation, free and the manager's manual from eflo.net, also free, but get the paid one before you launch and commit it to memory!)
2) open an account with vitelity (you may or may not use them long run, but it's a tiny investment and will allow immediate testing!)
3) put it online with a single agent (actually, the average P4 would likely hold your first 5 agents, but this exercise it to enable you to be authoritative BEFORE launch because you've already tested it
)
We offer installation, training, and even colocation services, as do many others. three hours of training at $35/hour brings most people up to "I can use my dialer!" quite nicely.