There are different DrayTEL calling tariffs - those tariffs cover the cost of calls you make out to the PSTN (regular phone network). Calls made between VoIP devices directly on the Internet, without dialling a PSTN number are free of charge. With all accounts you will get the DrayTEL Standard tariff automatically. On a pre-pay/PAYG (DrayTEL Classic) account, once you buy at least £20 of calling credit, you will be upgraded to the DrayTEL Silver Tariff, which stays active for 12 months. You can check which tariff you are on from the DrayTEL control panel and view the actual tariffs here. Tariffs are subject to change at any time.