Face to Face Payments
Wired terminals connect via a telephone line (PSTN) or a broadband connection (IP). Some models also have the option of connecting a Pinpad to the terminal.
Wireless terminals use Bluetooth to communicate to a base unit, which is connected via PSTN or IP. Wi-Fi models, can be supplied with an access point.
Mobile terminals use GPRS signal to achieve their connectivity. These terminals have a physical SIM card inside the device, like a mobile phone.