SPE 1.1 VoIP gateway *2RJ45(Lan/Wan), 1FXS port, 1PSTN pass-through port, 1USB-B port
SPE 1.1 pro VoIP gateway *2RJ45(Lan/Wan), 1FXS port, 1FXO port, 1PSTN pass-through port, 1USB-B port
SPE 2.1 VoIP gateway *2RJ45(Lan/Wan), 2FXS ports, 1PSTN pass-through port, 1USB-B port
SPE2.1 pro VoIP gateway *2RJ45(Lan/Wan), 2FXS ports, 1FXO port, 1PSTN pass-through port, 1USB-B port
SPE4.o VoIP gateway *2RJ45(Lan/Wan), 4FXS ports, 1USB-B port
SPE 4.x pro VoIP gateway *2RJ45(Lan/Wan), 4FXS ports, 2FXO port, 1PSTN pass-through port, 1USB-B port