Power Supply Redundance

During normal operation, the Acme Packet 3900 is load-balanced and draws power from both supplies. The two power supplies also provide hardware redundancy. If a power supply fails, the Acme Packet 3900 can rely on only one functional power supply to sustain normal operation. A malfunctioning power supply must be removed and replaced as soon as possible. If the Acme Packet 3900 starts up with only one power supply, the alarm LED will blink continuously.

The grounding terminals are used to attach the Acme Packet 3900 chassis to a local earth ground. The terminals are located between MGMT 2 port and USB port on the Acme Packet 3900 rear panel. The Acme Packet 3900 is shipped with nuts attached to the terminals along with a pre-made ground cable.