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 A4-series PCI cards are designed to interface analog and VoIP connections. For example, connect an Asterisk-based PBX to analog phone lines, or connect an analog PBX system to VoIP.
This base card is modular, meaning it can be expanded by connecting additional module to the base. Connect up to four Digium FXO or FXS modules to this A4 base PCI card.