The A200-FXS/FXO Module will not work as a standalone. This is a MODULE only and requires the A200/A400 Base. Modular FXO and FXS Support Superior audio quality in a card that is expandable from two to twenty-four ports in a 2U form factor - the Sangoma A200 FXO/FXS card delivers! Up to 24 Simultaneous PSTN calls (per interface slot) Compatible with all commercially available motherboards Lifetime warranty (with product registration) Hardware echo cancellation available Overview The A200 series of analog voice cards deliver superior audio quality in a compact 2U card that expands from two to twenty-four ports using a single interface slot. For optimum echo-cancelled voice quality and enhancement choose the A200D model with DSP daughtercard Hardware Echo Canceller. One DSP echo canceller on the A200D base card will support Telco-grade hardwareecho cancellation on all channels up to the card's maximum configuration in 24 ports with no additional CPU load. To reach this configuration, simply add additional Remora? cards to any base card in the A200 series. A singlePCI or PCI Express slot hosts the connection and ensures common synchronous clocking for all channels. Like all the cards in the award-winning Sangoma AFT Series Product Line, the A200 and Remora? system's architecture is shared with Sangoma's A101, A102, A104, and A108 cards, ensuring common 3.3 V or 5 V, high performance, universal PCI or PCI Express compatibility, and crash-proof field upgradable firmware to take advantage of enhancements, as soon they become available.