© 2015 Datacom Systems Inc9VS-10XX-F, VS-11XX-F, VS-12XX-F FASTstart Guide2.7 Rear — Power ModuleEach VERSAstream has two power modules on the back. These are for dual redundant powersupplies and should be connected to two separate circuits to ensure uninterrupted monitoring. Eachpower module has an AC power socket, an AC power switch, and two LED indicators labeled “AC”and “DC”. These LED indicators function in unison with the “POWER 1”, and “POWER 2”indicators on the front of the device.The LEDs located next to the “AC” and “DC” labels will illuminate green when a power supply isconnected and switched ON.If either LED is illuminated red, it indicates a defective power source. Immediate investigation isrecommended to insure redundant power integrity.2.8 Rear — Management ModuleThe SERIAL 1 connector port is a shielded DB9Female. This port can be connected to the COMport of any compatible network tool or PC inorder to access the Command Line Interface fordevice configuration.The SERIAL 2 connector port is reserved for future use.The MANAGEMENT connector port is a shielded RJ45 and is cabled to the network.The Media Access Control (MAC) address identifier and certification compliance identifiers areprovided on this rear label.