MRV Communications MR2228-S2C manual Port Status LEDs, Condition Status

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Table 1-1. Port Status LEDs

LED	Condition	Status
Fast Ethernet	Ports (Ports 1-	24)
(Link/Activity)	On/Flashing	Port has established a valid 10 Mbps network
	Amber	connection.
		Flashing indicates activity.
	On/Flashing	Port has established a valid 100 Mbps network
	Green	connection.
		Flashing indicates activity.
	Off	There is no valid link on the port.
Gigabit Ethernet	Ports (Ports	25-26 and Ports 27-28 when stacking is not
implemented)
(Link/Activity)	On/Flashing	Port has established a valid 10/100 Mbps network
	Amber	connection.
		Flashing indicates activity.
	On/Flashing	Port has established a valid 1000 Mbps network
	Green	connection
		Flashing indicates activity.
	Off	There is no valid link on the port.

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Contents Stackable Fast Ethernet Switch Installation Guide Installation Guide Contents Appendix B Cables Overview Switch ArchitectureIntroduction Description of Hardware Network Management Options10BASE-T/100BASE-TX Ports 1000BASE-T/SFP PortsStacking Ports Port and System Status LEDsPort Status LEDs Condition StatusPower Supply Receptacles System Status LEDsFeatures and Benefits ConnectivityExpandability PerformanceManagement Introduction to Switching Network PlanningApplication Examples Collapsed BackboneNetwork Aggregation Plan Collapsed BackboneRemote Connections with Fiber Cable Network Aggregation PlanMaking Vlan Connections Remote Connections with Fiber CableApplication Notes Making Vlan ConnectionsEthernet Cabling Installing the SwitchSelecting a Site Equipment Checklist Package ContentsMounting Optional Rack-Mounting EquipmentRack Mounting Attaching the BracketsDesktop or Shelf Mounting Attaching the Adhesive FeetInstalling an Optional SFP Transceiver Connecting Switches in a StackConnecting to a Power Source Connecting Switches in a Ring-topology StackConnecting to the Console Port Wiring Map for Serial CableDTE Port Connecting Network Devices Connecting to PCs, Servers, Hubs and SwitchesMaking Network Connections Twisted-Pair DevicesNetwork Wiring Connections Making Twisted-Pair ConnectionsNetwork Wiring Connections Fiber Optic SFP DevicesConnectivity Rules 1000BASE-T Cable RequirementsCable Labeling and Connection Records Mbps Gigabit Ethernet Collision DomainMbps Fast Ethernet Collision Domain Mbps Ethernet Collision DomainPage Appendix a Troubleshooting Diagnosing Switch IndicatorsPower and Cooling Problems Table A-1. Troubleshooting Chart Symptom ActionStack Troubleshooting InstallationIn-Band Access 10BASE-T/100BASE-TX Pin Assignments Appendix B CablesTwisted-Pair Cable and Pin Assignments Straight-Through Wiring Crossover Wiring1000BASE-T Pin Assignments Fiber Standards Cable Testing for Existing Category 5 CableAdjusting Existing Category 5 Cabling to Run 1000BASE-T Appendix C Specifications Forwarding Mode Management Features In-Band ManagementSafety Throughput1000BASE-T Auto-NegotiationBandwidth CollisionMedia Access Control MAC RJ-45 ConnectorSwitched Ports Ieee 802.3ab