![Digium 1A4B01F Base FXS / FXO PCI Express Card with Echo Cancellation Digium 1A4B01F Base FXS / FXO PCI Express Card with Echo Cancellation](https://cdn11.bigcommerce.com/s-u3uxlvxq3h/images/stencil/400x400/products/1285/18722/1A4B01F-2__42272.1584423302.jpg?c=1)
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The Digium A8B01F is a base PCI card designed to house FXO and FXS modules. This PCI card also includes echo cancellation for carrier-grade audio quality. Attach up to two quad-port modules or four single-port modules, then swap them or remove them as needed. The Digium 1A8B01F PCI Express card is compatible with Asterisk.