It is the business practice of sending all clients' billing info to a separate company, who then does everything for you. It also allows a company to cut down on time and human resources spent on administrative tasks.
TDM800P is an eight Port analog PCI 3.3/5.0V Card equipped with echo cancellation and 8 Trunk Interfaces. This is a half length PCI 2.2 complaint, 8 port card meant for connection of analog POTS lines and analog phones via personal computer. It provides support for combinations of FXO and FXS modules maximum of eight lines.