Digium 1A4A04F 4 Port 2-FXS / FXO-2 PCI Card with EC
4 port modular analog PCI 3.3 / 5.0V card with 2 Station and 2 Trunk interfaces and HW Echo Can - Replacement for: 1TDM422EF One (1) - four ( 4) analog ports PCI or PCI Express bus architectures Combine line (FXO) and station (FXS) modules Accepts up to four (4) single-port modules Optional DSP -based carrier grade echo cancellation module 32-bit 33MHz Loop Start or Kewl Start Signaling Temperature: 0 ° to 50 ° C Digium patented technology for better audio VoiceBus-