3Com SuperStack 3 3C16440A User Manual

Also see for Switch 4800G PWR 24-Port: Product guide Datasheet Datasheet Configuration guide Configuration guide

Contents

3Com SuperStack 3 3C16440A User Manual Manual pdf 3 page image

4 Transceiver Module Status LEDIf a Twisted Pair or Fiber Transceiver Module has been fitted, the LEDbehaves the same as the TP Status LEDs, refer to 3.For other Transceiver Modules, the LED shows these states:A Transceiver Module port connected to a coaxial cable segmentmay partition if the segment is incorrectly terminated.The Transceiver Module port may partition if the SQE test pulseis enabled on its transceiver. SQE test should be disabled ontransceivers used to connect 802.3 repeaters to the network.5 Traffic LEDThe Traffic LED flashes green whenever data is received on one of thetwisted pair ports or the Transceiver Module port.If this LED does not flash, there is no data being received by the unit. Ifthe unit is receiving data but the LED does not flash, the LED has failed.Contact your supplier.6 Collision LEDThe Collision LED flashes yellow when a packet collision has beendetected on a segment connected to one of the twisted pair ports or theTransceiver Module port.Under normal 802.3 Ethernet operation, collisions occur and cause theCollision LED to flash. The probability of collisions increases during heavyactivity on the network. The Auto Partition/Reconnection functionpartitions a segment from the rest of the network if more than32 consecutive collisions are detected on that segment.If the Collision LED lights for long periods of time, it indicates a highamount of collisions which can slow your network down. If this happens,you may need to separate parts of your network with a switch. Contactyour supplier.7 Power LEDThe Power LED indicates a number of conditions:Rear Panel Connections8 Power SupplyThe Baseline Hub automatically adjusts to the supply voltage. Only use thepower cord that is supplied with the Baseline Hub, or a power cord of thesame type and rating.9 Socket for Redundant Power SystemOnly connect a 3Com SuperStack 3 Advanced RPS (Redundant Power Sys-tem) to this socket. For details, follow the installation instructions in theguide accompanying the Redundant Power System.10 Transceiver Module SlotA variety of 3Com plug-in Transceiver Modules can be installed in theBaseline Hub. Transceiver Modules provide direct network connections todifferent media. Contact your supplier for information on the latest Mod-ules.CAUTION: Do not remove the Transceiver Module blanking platewhile the hub is connected to a power source.Ensure that SQE test is disabled on the Transceiver Module that you areusing.To install a Transceiver Module, refer to the guide that accompanies it. Ifyou subsequently remove the Transceiver Module, you must replace theblanking plate to aid the circulation of cooling air and prevent the entryof dust and debris.11 Self-adhesive PadsThe Baseline Hub is supplied with four standard height and two reducedheight self-adhesive rubber pads. Usage of the feet depends on where theBaseline Hub is placed:! Use the four standard height pads if the unit is to be placed on a flatsurface or stacked with another SuperStack 3 product of the samedimensions.! Use the two reduced height pads and two of the standard heightpads if the unit is to be stacked on a SuperStack 3 unit of differentdimensions — Line up the front of the units, and use the twostandard height pads at the front (to fit the recess of the unitbeneath) and use the two reduced height pads at the back.Do not apply the pads if you intend to rack mount the hub.If the hub is to be part of a free standing stack, apply the pads to eachmarked corner area on the underside of the hub. Place the hub on top ofthe lower unit, ensuring that the pads of the upper unit locate with therecesses of the lower unit.Positioning the Baseline HubCAUTION: When installing the Baseline Hub in a stack of differ-ent size units, the Baseline Hub must be installed above anylarger units. Do not have a free standing stack of more than sixunits.When deciding where to position the Baseline Hub ensure:! It is accessible and cables can be connected easily.! Cabling is away from: sources of electrical noise such as radios, transmitters and broad-band amplifiers. power lines and fluorescent lighting fixtures.! Water or moisture cannot enter the case of the unit.! Air flow around the unit and through the vents in the side of the caseis not restricted (3Com recommends that you provide a minimum of25mm (1in.) clearance).To prolong the operational life of your units:! Never stack units more than six high if free standing, and ensure thatcables are supported so that they do not cause the stack to fall over.! Do not place objects on top of any unit or stack.! Do not obstruct any vents at the sides of the case.Power SupplyPower problems can be the cause of serious failures and downtime inyour network. Ensure that the power input to your system is clean andfree from sags and surges to avoid unforeseen network outages. 3Comrecommends that you install power conditioning, especially in areas proneto black outs, power dips and electrical storms.The unit is intended to be grounded. Ensure it is connected to earthground during normal use. Installing proper grounding helps to avoiddamage from lightning and power surges.Rack MountingThe Baseline Hub can be mounted in a 19-inch equipment rack. Refer to“Mounting Kit Instructions”.Power UpUse the following sequence to power up the Baseline Hub:! Check the network connections and cables.! Connect the power supply cable to the appropriate power socket onthe rear panel of the unit. Refer to 8 or 9.! Connect the plug to the power supply outlet socket. If you are usinga 3Com Redundant Power System, ensure that it is switched on.When the Baseline Hub is powered on, the Power LED should be lit. If it isnot, refer to 7, “Power LED”.Green Transceiver Module fitted correctly and not partitioned.Flashing green Transceiver Module partitioned.Off Transceiver Module is faulty or fitted incorrectly.Green The unit is powered on and ready for use.Off The unit is powered off.The power cable may be connected incorrectly or the fuse withinthe power cord’s plug may be faulty (UK models only).If the unit appears to be operating and the LED is off, contactyour supplier.3