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Making Connections

21

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.

When connecting two hubs or hub stacks in this fashion, the

maximum distance between any two end-stations in a collision

domain is 205 meters. If each link between the hub and an end-

station is 100 meters, then the hub-to-hub connection is limited to

5 meters. However, if the longest hub-to-end-station connection is

less than 100 meters, then the hub-to-hub connection can be up to

100 meters long as long as the 205-meter total network diameter

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Содержание TE100-DX16R

Страница 1: ...TE100 DX16R DX24R DX32R 16 24 32 Ports Ethernet Fast Ethernet Dual Speed Stackable Hubs User s Guide Rev 01 JULY 1998 505 0100 004 Printed In Taiwan RECYCLABLE ...

Страница 2: ... equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this user s guide may cause harmful interfer ence to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense CE Mark Warning This is a Class A p...

Страница 3: ...uct Description 3 Product Features 4 CHAPTER 2 UNPACKING AND SETUP 7 Unpacking 7 Identifying External Components 8 Front Panel i Rear Panel 10 Installing the Hub 11 Installation 11 Rack Mounting 11 CHAPTER 3 UNDERSTANDING INDICATORS 13 Hub State Indicators 14 Port State Indicators 15 CHAPTER 4 MAKING CONNECTIONS 17 ...

Страница 4: ...es 18 Hub to End Station Connection 19 Hub to Hub Uplink 21 Module Installation 23 APPENDIX A CABLES AND CONNECTORS 25 100BASE TX Ethernet Cable and Connectors 25 Crossover Cables 26 APPENDIX B SPECIFICATIONS 29 General 29 Hub to Hub Cascading 30 LED Indicators 30 Environmental and Physical 30 ...

Страница 5: ...mply as hub or hubs where the text applies to all models Model names are normally used only to differentiate between models where necessary Unless differentiated by model name all information applies to all models Overview of the User s Guide Chapter 1 Introduction Provides information on Fast Ethernet networks and introduces the features of the 16 24 32 port dual speed stackable Ethernet Fast Eth...

Страница 6: ...indicators is essential to effectively using the hub Chapter 4 Making Connections Provides information on connecting to the hub s twisted pair stacking hubs and linking with other 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 ...

Страница 7: ... either IEEE 802 3 10BASE T con nections twisted pair Ethernet operating at 10 megabits per second or IEEE 802 3u 100BASE TX connections twisted pair Fast Ethernet operating at 100 megabits per second All of the twisted pair ports support NWay auto negotiation allowing the hub to automatically detect the speed of a network connection This means you can connect all of your Ethernet and Fast Etherne...

Страница 8: ...ec tion The hubs in this series each have one slot for slide in module Product Features The list below highlights the features and specifications of hubs in the series Compatible with the IEEE 802 3 10BASE T Ethernet and 802 3u 100BASE TX 100BASE FX Fast Ethernet industry standards for interoperability with other Ethernet Fast Ethernet network devices Ethernet connections support Category 3 or bet...

Страница 9: ...ietary daisy chain ports for cascading up to four hubs to form one logical hub Uplink port allows easy linking of two Fast Ethernet hub stacks to further expand your network 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 pe...

Страница 10: ......

Страница 11: ...ks the contents The carton should contain the following items One dual speed stackable hub One AC power cord suitable for your area s electrical power connections One daisy chain cable 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 you...

Страница 12: ...ont Panel LED Indicator Panel Refer to the next chapter Understanding Indicators for de tailed information about each of the hub s LED indicators Twisted Pair Ports Use any of these ports to connect stations to the hub The ports are MDI X ports which means you can use ordinary straight through twisted pair cable to connect the hub to PCs workstations or servers through these ports If you need to c...

Страница 13: ...plink 1 port port 32 and the Uplink 2 is really the same port except that their pinouts are different Do not use both Port 16 and the Uplink 1 port Port 32 and the Uplink 2 port at the same time In 24 port model port 12 and the Uplink 1 port port 24 and the Uplink 2 is really the same port except that their pinouts are different Do not use both Port 12 and the Uplink 1 port Port 24 and the Uplink ...

Страница 14: ...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 Daisy Chain OUT Port Works in conjunction with the Daisy Chain IN Port see above Connect this port to the Daisy Chain IN Port of the next hub in the stack usually placed immediately belo...

Страница 15: ...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 For information on rack installation see the next section Rack Mounting When installing the hub stack on a level surface attach the rub ber feet to the bottom of each device The rubber feet cushion the hub and protec...

Страница 16: ...Dual Speed Stackable Hubs User s Guide Unpacking and Setup 12 Then use screws provided with the equipment rack to mount each hub in the rack ...

Страница 17: ...ators 13 3 3 UNDERSTANDING INDICATORS 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 ...

Страница 18: ...icators indicate data packet on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments will blink green 10M Collision 100M Collision These indicators indicate data collisions on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments of the hub If several hubs are stacked or linked together all of them should detect and indicate the same collision since colli sions span the enti...

Страница 19: ...n 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 100M Link Rx This indicator green when the port is connected to a 100Mbps Fast Ethernet station If the station to which the hub is ...

Страница 20: ......

Страница 21: ...ack up to four hubs using the daisy chain ports to form one logical hub In this configuration the interconnected hubs constitute a single logical unit providing a maximum of 128 twisted pair 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 e...

Страница 22: ...ollowing connectivity rules The maximum length of a twisted pair cable segment is 100 meters Cabling should be Category 3 or better Between any two end stations in a collision domain there may be up to five cable segments and four intermediate re peaters hubs hub stacks or other repeaters And be attention that you have to use 10Mbps Ethernet re peaters to connect in your network segments to avoid ...

Страница 23: ...sted pair segment that is the distance between a port in the hub to a single address net work device such as a PC server or Ethernet switch is 100 meters Cabling and other wiring should be certified as Category 5 UTP or shielded twisted pair STP 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 th...

Страница 24: ...mbination of PCs servers and other sin gle address network devices to the twisted pair ports using straight through twisted pair cables These cables should not be crossed over The following figure illustrates the pin assignments for a straight through cable When connecting a PC or a server the system being connected should have an Ethernet or Fast Ethernet network interface card with a twisted pai...

Страница 25: ...requires an ordinary straight through twisted pair cable When connecting two hubs or hub stacks in this fashion the maximum distance between any two end stations in a collision domain is 205 meters If each link between the hub and an end station is 100 meters then the hub to hub connection is limited to 5 meters However if the longest hub to end station connection is less than 100 meters then the ...

Страница 26: ...witch or Hub Non Uplink Straight Through Uplink Crossover X Server or PC Crossover X A crossover cable is a straight through twisted pair cable in which the wires have been crossed The figure below shows the pin as signments for an 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...

Страница 27: ...ocate the module slot in the hub s rear panel 2 Using a screwdriver undo the two screws and remove the dust cover on the module slot 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 ...

Страница 28: ...Dual Speed Stackable Hubs User s Guide Making Connections 24 We recommend that you retain the dust cover in case you need to remove the module for an extended period sometime in the future ...

Страница 29: ...tors 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 Maximum network diameter 205 meters Connectors RJ 45 ...

Страница 30: ...7 Not used Not used 8 Not used Not used Crossover Cables When cascading or connecting the hub to another switch bridge or hub through the UTP port a modified crossover cable is neces sary With a crossover cable two pairs of wires are switched at one connector end Carry out the following steps to create a cus tomized crossover twisted pair cable 1 Leave one end of the cable as is with the RJ 45 con...

Страница 31: ...Cables and Connectors 27 2 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 ...

Страница 32: ......

Страница 33: ...Star Protocol CSMA CD Network Data Transfer Rate Fast Ethernet 100Mbps Ethernet 10Mbps Number of Ports 16 16 port model 24 24 port model or 32 32 port model 10BASE T 100BASE TX ports Network Media Ethernet Category 3 or better UTP cable 100m maximum Fast Ethernet UTP STP Cat 5 100 ohm twisted pair 100m maximum for hub to station links UTP Cat 5 100 ohm UTP STP 5m maximum for hub to hub linking ...

Страница 34: ...nk 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 200mm 44mm 19 inch rack mountable Operating Temperature 10 to 40 C Storage Temperature 20 to 70 C Humidity 10 to 90 non condensing Emi...

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