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Digium's A8A-series PCI cards can support up to eight connections. This modular PCI card can be configured with two quad-port modules or up to four single-port modules. Use the Digium 1A8A00F base PCI card to connect an analog PBX to a VoIP service, or connect analog phone lines to an Asterisk system. The Digium 1A8A00F PCI card is compatible with Asterisk.