Since PCS1 is a prepaid service, you would need a funds pool for sending faxes, or making international calls. The funds pool will allow you to setup a pool of money that you prepaid into the system to make international calls, or if you decide to call 411. You can also set it to automatically fill when you drop below a threshold. For example, $25 will be added when you drop below $5. This will assure that you would always have funds in the funds pool, and it never runs dry. Since this is a prepaid service, you would likely not get a refund if you decide to no longer be customer of PCS1.