Digium AEX844E - 8 port modular analog PCI-Express x1 3.3V card with 4 Station and 4 Trunk interfaces and HW Echo Can
Digium AEX844E - PCI-Express card with analog ports FXS, FXO.
Digium AEX844E: AEX800P + (1) S400M Quad FXS Module + (1) X400M Quad FXO Module + echo cancellation module.
The AEX800 board occupies one PCI Express slot and is equipped with eight RJ-11 sockets. This, firstly, reduces the need for seats in the server case, and, on the other hand, eliminates the need for additional extension cables and other additional elements, for potential reasons Vidmov.
The AEX800 port is configured independently from others for operation in intra-station or inter-interface mode. Hardware echo-muting features, available on all eight channels, provide the ability to improve coupling.
This method of direct payment does not require special cables for connecting lines to the cross-panel, and also saves space for the VoIP telephony server.
Traditionally, the board allows you to select almost any configuration with FXO and FXS ports. For this AEX800P there are two banks of ports with 4 analog interfaces. Each bank can install either a 4-port module S400M (FXS) or X400M (FXO), or 2 single-port modules S110M (FXS) or X100M (FXO). Apparently, the use of 4-port modules is ideal for achieving maximum capacity. Also, the support for single-port modules allows owners of Asterisk boards based on TDM400P to switch to the PCI Express bus, purchasing only the AEX800P base board without additional modules.
Like Digium's front-end boards, the AEX800P board can be equipped with an optional hardware echo damping module VPMADT032 . When this option is enabled, echo cancellation uses the High Performance Echo Cancellation (HPEC) solution, which adheres to the G.168 specification and suppresses echo in a range of 16 up to 128 ms.
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