Digium 1A4B03F 4 FXO PCI-e Card with Echo Cancellation
You cannot add "Sangoma B600DE Analog Voice Card: 4 Ports FXO + 1 Port FXS with hardware echo canceller PCI Express" to the cart because the product is out of stock.
Digium 1A4B03F 4 FXO PCI-e Card with Echo Cancellation