Digium TDM800P Analog Card
The 
Digium TDM800P is a half length PCIx 2.2  compliant, 4 port card that support 4 analog telephone lines.
Digium TDM800P Analog Telephony Card Information:
As a modular device the Digium Wildcard TDM800P acts as a host device  for Carrier and Station side modules to create a robust telephony  interface for the most demanding Asterisk environments.
The TDM800P contains two module banks. Each bank supports up to four  analog interfaces. The module banks may be filled either with one  standard Digium quad analog module, or up to two standard Digium single  analog modules enabling the creation of any combination of ports. The  optional hardware echo cancellation module provides 1024 taps (128  milliseconds) of echo cancellation for superior echo cancellation on  both FXO and FXS interfaces.
Using this card in concert with  Digium's Asterisk software, standard PC hardware, and the Linux OS, you  can create SMB or SOHO telephony environments capable of satisfying the  needs of small or medium business applications at an industry-leading  price.
Digium TDM800P Features:
    - 5 Year Warranty
- Up to 8 FXS/FXO Ports
- Voltage Agnostic 3.3v or 5v
- PCIx interface
- Digium Exceptional Satisfaction Program (ESP)
- Optional Echo Cancellation
Additional Product Information:
Digium Part Number: 1TDM800PLF
UPC Code: 797734474688