The Digium AEX808B is an AEX800 card with 2 x Quad FXO modules attached.
The AEX800 is a half-length PCI-Express 1.0-compliant, 8 port analog interface card. It supports combinations of station and/or trunk/line modules for a total of 8 interfaces.
Like the Digium PCI-based TDM800P, the AEX808B provides an industry first with 8 standard two-wire, RJ-11 interfaces on a single card bracket. This eliminates the need for multiple brackets, external dongles, or splitters. In doing so, the AEX800 reduces part complexity, cable clutter, and points of failure.
The AEX800 contains two module banks. Each bank supports up to four analog interfaces and may be filled either with one standard Digium® quad station (S400M) or line/trunk (X400M) analog module, or up to two standard Digium single analog station (S110M) or line/trunk (X100M) modules, enabling the creation of any combination of ports.
The optional VPMADT032 hardware echo cancellation module provides 1024 taps (128 milliseconds) of echo cancellation for superior echo cancellation on both types of analog interfaces.
The image shown is an AEX800 card bundled with the echo cancellation module (purple), 1 x Quad FXS module (green), and 1 x Quad FXO module (red).