![Digium 1A8B01F Base FXS / FXO PCI Express Card with Echo Cancellation Digium 1A8B01F Base FXS / FXO PCI Express Card with Echo Cancellation](https://cdn11.bigcommerce.com/s-u3uxlvxq3h/images/stencil/400x400/products/1299/18736/1A8B01F-2__26110.1584423319.jpg?c=1)
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Digum 1A4B01F is a modular PCI Express card with built-in echo cancellation. Mix and match this telephony card with up to four FXO and FXS modules, letting you provision the A4B01F PCI Express card as your network requires. Use the Digium 1A4B01F card to leverage an analog and VoIP system. This PCI Express card is compatible with Asterisk.