Chapter 1 Introduction 1.1.4 Front Panel Ports and LEDs RESET Button ALARM LED PWR LED DI LED SFP combo ports USB CONSOLE port RJ45 ports 1.1.5 Bottom Panel Grounding Screw Power ports DI & DO ports 1-3 Model Name ONE RING LED ONE CHAIN LED ONE COUPLING LED Model Name ONE RING LED ONE CHAIN LED ONE COUPLING LED ONE RING LED Speed LED LINK/ACT LED