FCC Warning This equipment has been tested and found to comply with the lim- its for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
ABLE OF ONTENTS .............1 BOUT THIS UIDE Conventions .................1 Overview of the User's Guide ............1 1 : I ..........3 HAPTER NTRODUCTION Product Description..............3 Product Features .................4 2 : U ........7 HAPTER NPACKING AND ETUP Unpacking..................7 Identifying External Components ..........8 Front Panel ..................i Rear Panel ..................10...
Page 4
Connectivity Rules ..............18 Hub to End-Station Connection ..........19 Hub-to-Hub Uplink..............21 Module Installation ..............23 A : C ......25 PPENDIX ABLES AND ONNECTORS 100BASE-TX Ethernet Cable and Connectors ......25 Crossover Cables................26 B : S ...........29 PPENDIX PECIFICATIONS General..................29 Hub-to-Hub Cascading..............30 LED Indicators ................30...
BOUT UIDE This guide discusses how to install and use the 16/24/32 port dual- speed stackable Ethernet/Fast Ethernet Hubs Conventions References in this manual to the 16/24/32 port dual-speed stack- able Ethernet/Fast Ethernet Hubs are frequently written simply as “hub” or “hubs” where the text applies to all models. Model names are normally used only to differentiate between models where necessary.
Page 6
100BASE-TX or 10BASE-T hubs. Appendix A, Cables and Connectors. Provides specifications on the cables and connectors used with the hubs. Appendix B, Specifications. Lists the hub’s specifications. About This Guide...
10Mbps to 100Mbps. The hubs in the series, available in 16-port, 24-port and 32-port models, can be stacked with up to four hubs in a stack. A stack of four 32-port hubs gives a total of 128 Ethernet or Fast Ethernet...
An 16/24/32 port dual-speed stackable Ethernet/Fast Ethernet Hubs stack operates as a Class II Fast Ethernet re- peater, allowing it to be linked to another Class II Fast Ethernet stack in the same collision domain. In the basic configuration, the 10Mbps and 100Mbps segments are separate but it can be intercommunicate.
Page 9
Standard-size (19”, 1U height), rack mountable Optional slide-in module: 100BASE-FX (see Chapter 4 : Making Connections). The total bandwidth of each stack is up to 140Mbps that includes one 100Mbps segment and four 10Mbps segments. (If per stack has stacking four units)
Four rubber feet to be used for shock cushioning Screws and two mounting brackets This User’s Guide Inspect the hub and all accompanying items. If any item is dam- aged or missing, report the problem immediately to your dealer. Unpacking and Setup...
Identifying External Components This section identifies all the major external components of the hub. Both the front and rear panels are shown, followed by a de- scription of each panel feature. The indicator panel is described in detail in the next chapter.
Page 13
Crossover Cables section. Uplink Ports The Uplink port is an MDI port, which means you can connect the hub (or hub stack) to another device with MDI-X ports us- ing an ordinary straight-through cable, making a crossover cable unnecessary.
Daisy-Chain OUT port of the previ- ous hub in the stack (usually placed immediately above it). A cascade of four hubs can be created in this way. The first and last hubs in the stack use only one of the daisy-chain ports, while the others use both.
(such as motors), vibration, dust, and direct exposure to sunlight. Leave at least 10cm of space at the front and rear of the hub for ventilation. Install the hub on a sturdy, level surface that can support its weight, or in an EIA standard-size equipment rack.
Page 16
Dual-Speed Stackable Hubs User’s Guide Then, use screws provided with the equipment rack to mount each hub in the rack. Unpacking and Setup...
NDERSTANDING NDICATORS Before connecting network devices to the hub, take a few minutes to look over this section and familiarize you with the front panel LED indicators of your dual-speed hub, depicted below. Understanding Indicators...
This indicator lights green when the hub is receiving power; otherwise, it is off. Switch Activity This indicator green when the switch circuit active and the in- dicator blinking green when transfers signals between 10-Mbps and 100-Mbps network segments. 10M Activity, 100M Activity These indicators indicate data packet on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments will blink green.
This indicator green when the port is connected to a 10Mbps Ethernet station , If the station to which the hub is connected is powered off, or if there is a problem with the link, the LED will remain off. And the indicator blinking green when the data will be received to all other connected ports.
Use the provided daisy-chain cable to connect the Daisy-Chain OUT port on the rear panel of one hub to the Daisy-Chain IN port on the hub below it, as shown in the figure below. Repeat this procedure for each hub to be included in the stack.
Dual-Speed Stackable Hubs User’s Guide Hubs should not be added to the stack or removed from the stack while the power is on to any hub in the stack. Always turn power to the entire stack before adding or removing hubs.
The maximum diameter in a collision domain is about 205 meters using two Class II hubs (or hub stacks). Between any two end-stations in a collision domain, there may be up to three cable segments and two Class II hubs or hub stacks. Hub to End-Station Connection After installing the hub properly, it can support up to 32 ports, 24 ports or 16 ports end-station connections.
Page 24
Dual-Speed Stackable Hubs User’s Guide Each Ethernet connection requires a Category 3 or better UTP cable. It is recommended that you use Category 5 cabling for all connections, in order to make it easier to transition all stations to 100Mbps.
Hub-to-Hub Uplink You can link two hubs or hub stacks to each other using any of the twisted-pair ports or the Uplink port. Linking hubs using ordi- nary twisted-pair ports requires crossover twisted-pair cables; linking using one ordinary twisted-pair port and the Uplink port requires an ordinary straight-through twisted-pair cable.
Page 26
Ethernet or Fast Ethernet crossover cable: There is 100BASE-FX optional module that may be added to any of the hubs in the series. Each of the modules offers a 100BASE- FX additional network interface that allows for greater flexibility in how these hubs may be used in a network.
3. Holding the module component-side up and connector-side in, gently slide the module along the guides and seat it in the in- ternal connector. 4. Using a screwdriver, replace the two screws and tighten until snug.
Page 28
Dual-Speed Stackable Hubs User’s Guide We recommend that you retain the dust cover in case you need to remove the module for an extended period sometime in the future. Making Connections...
ABLES AND ONNECTORS 100BASE-TX Ethernet Cable and Connectors Cable characteristics: 0.4 to 0.6 mm (22 to 26 AWG) 4-pair (only two pairs/four wires are used for 100BASE-TX); Cate- gory 5 unshielded twisted-pair or EIA/TIA-568 compliant, 100-ohm shielded twisted-pair Maximum segment length: 100 meters...
Carry out the following steps to create a cus- tomized, crossover twisted-pair cable: Leave one end of the cable as is, with the RJ-45 connector intact. The wiring at just one end of the cable needs to be modified. Cables and Connectors...
Page 31
At the other end of the cable, connect wires 1 and 2 to con- tacts 3 and 6 respectively. Likewise, connect wires 3 and 6 to contacts 1 and 2. Refer to the following diagram: Cables and Connectors...
Hub Status: Power, FX Link/Rx, 100M Activity, 10M Activity, 10M Collision, 100M Collision, Switch Activity Port Status (per port): 10M Link/Rx, 100M Link/Rx Environmental and Physical Power Supply: 100 to 240 VAC, 50 or 60 Hz internal universal power supply Power Consumption: 40W (max.) Dimensions: 440mm...