1 x FXO+ 1 x FXS ModuleSupported Models: • AX800P/AXE800P (8 analog ports mother board)• AX1600P/AXE1600P (16 analog ports PCI-E mother board)• AX2G4A (2 GSM channels and 4 FXO/FXS ports PCI Card)• IP02 (2 ports FXO/FXS IP PBX)• IP08 (8 ports FXO/FXS IP PBX)• IP2G4A (2 GSM channels and 4 FXO/FXS ports IP PBX)