GarrettCom Magnum ST80 manual Functional Operation, Use of LED Indicators

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Stackable Personal Hubs

Installation and User Guide (04/01)

4.0OPERATION

This section details the various operational features of Magnum ST80 Personal Hubs, including a description of the LED indicators. Stackable Personal Hubs are fully compliant with the Ethernet Version 2/IEEE 802.3 Repeater Specification for CSMA/CD 10 Mbps operation and will function accordingly.

4.1Functional Operation, Use of LED Indicators

Power On (PWR) LED: Illuminates GREEN to show proper DC power.

Collision (COL) LED: Illuminates YELLOW whenever a transmit collision occurs on a port within the hub.

Link Status and Transmit (LINK/TX) LED: Per port LEDs detect and indicate by illuminating GREEN that there is proper connectivity on a 10BASE- T network segment. The LED will turn off intermittently when the port transmits a packet. In the event that connectivity is lost between the ends of that segment or a loss of power occurs in the segment at either end, the LED is turned off.

Note: When port 8 is wired for up-link to another hub, the LINK LED will normally be on when the up-link switch is set to the “X” position. With the up-link switch off (“==”), LINK is off as the up-link is disabled. This permits local operation of the ST80 Personal Hub with full bandwidth.

Polarity and Receive (POL/RX) LED: Per port LEDs intermittently illuminate GREEN to indicate that data packets are being received from the segment. This provides a visual indication of network activity for re-assurance of normal operation, and is also helpful in troubleshooting. If reversed polarity is detected, the LED becomes steady GREEN (the ST80 automatically compensates for the reversed polarity and resumes normal operation).

Partitioning and Re-connection:Stackable Personal Hubs will automatically partition any port where 32 consecutive collisions or 6.5 ms of continuous transmissions occurs. Network integrity is checked every 800 ms and segment re-connection occurs after one 512-bit packet is transmitted without error. The status LEDs of a partitioned port indicate the partitioned state by blinking alternately.

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Contents Personal Hub Personal Hub TrademarksGarrettCom, Inc Contacting GarrettCom, IncInstallation Table of ContentsMagnum Line Technical Specifications Performance Power Supply ExternalConnectors Maximum Ethernet Segment LengthsSwitches DimensionsWeight WarrantyOrdering Information Model DescriptionIntroduction Inspecting the Package and ProductProduct Description NetworkPort Connectors Stack Enable Switch IRBStackable Personal Hubs Installation and User Guide 04/01 Features and Benefits Expandable Design Installation VersatilityLEDs Simplify Network Installation and Maintenance Low cost, stand-alone 10BASE-T connectivityTo existing network via switchable Up-Link port ApplicationsFiber backbone Connection Installation Power SupplyLED will Illuminate Power Jack ExternalWall or Vertical Surface Mounting for non-stacked units only Combining and Mounting Stacked UnitsTwisted Pair Segment Connections AUI ConnectionAUI Pin Assignments Function ShellBNC Connection Model ST80-B only Fiber Optic Connection Model ST80-F onlySwitchable Up-Link Feature Stacking the ST80 Personal HubsIncreased port capacity via stacking Switch in X position Cascading the ST80 Personal Hub with the Up-Link portFunctional Operation, Use of LED Indicators OperationUsing the Up-Link switch Using the BNC Internal Termination Switch Model ST80-B onlyUsing the Stack Enable switch Troubleshooting Before Calling for AssistanceReturn Material Authorization RMA Procedure When Calling for AssistanceNo Problem Found Shipping and Packaging Information
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