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
Digium's A4B-series telephony cards feature PCI Express architecture. This base card can support up to four analog expansion modules, either FXS or FXO. Scale the 1A4B00F PCI Express card to your system's requirements, leveraging analog and VoIP. This Digium card is compatible with Asterisk.