![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)
Industry Best Pricing
Quantity discounts available
Have a question?
Quantity discounts available
Pre-sales product and solution advice
Add-on tech support plans available
Same day shipping on most orders
This base PCI card for Digium's A4-series is scalable through expansion modules. Connect up to four interchangeable FXO or FXS modules. This base card also includes a carrier-grade echo cancellation unit for higher audio quality.
The Digium A4-series base card is designed to connect analog and VoIP components for a unified PBX. Slide this card into an open PCI slot.