# System requirements

To install and use AG 2000 boards, your system must have:

- Natural Access installed.

- An available PCI bus slot.

- An H.100 bus connector cable if you are connecting to any other H.100 boards.

- An MVIP-90 connector cable if you are connecting to MVIP-90 boards.

- An MVIP bus adapter if you are connecting to the MVIP-90 bus.

- A grounded chassis (with three-prong power cord).

- For DID: a -48 VDC external power supply.

- For subscriber loop: a ringing power supply.

Note: Use the power supplies that are resold and supported by NMS.

NMS recommends an uninterruptable power supply (UPS) for increased system reliability. The UPS does not need to power the PC video monitor except in areas prone to severe lightning storms.