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Fast Ethernet Stackable Hubs User’s Guide

 

Making Connections 

 

15

4 

4 

M

AKING 

C

ONNECTIONS

 

This chapter discusses how to make connections to the hub’s 

twisted-pair, cascading hubs to create a stack, and linking with 

other hubs (or hub stacks). 

Hub Cascading/Building a Stack 

You can stack 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 96 

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 pro-

cedure for each hub to be included in the stack. 

Summary of Contents for TE100-H16R

Page 1: ...TE100 H16R H24R 16 24 Ports Fast Ethernet Stackable Hubs User s Guide ...

Page 2: ...Fast Ethernet Stackable Hubs User s Guide ii 16 24 Ports Fast Ethernet Stackable Hubs User s Guide Rev 01 AUG 1998 505 1100 004 Printed In Taiwan RECYCLABLE ...

Page 3: ...is 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...

Page 4: ...uide 2 1INTRODUCTION 3 Product Description 3 Product Features 4 2UNPACKING AND SETUP 5 Unpacking 5 Identifying External Components 6 Front Panel 6 Rear Panel 7 Installing the Hub 9 Installation 9 Rack Mounting 10 3UNDERSTANDING INDICATORS 11 Hub State Indicators 12 100BASE FX Module Indicators 12 Port State Indicators 13 ...

Page 5: ... Connectivity Rules 16 Hub to End Station Connection 17 Hub to Hub Uplink 19 100Base FX Module Installation 20 5CABLES AND CONNECTORS 23 100BASE TX Ethernet Cable and Connectors 23 Crossover Cables 25 6SPECIFICATIONS 27 General 27 Hub to Hub Cascading 28 LED Indicators 28 Environmental and Physical 28 ...

Page 6: ......

Page 7: ...able Fast Ethernet Hubs Conventions References in this manual to the 16 24 port stackable 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 Unless differentiated by model name all information applies to all models ...

Page 8: ... setting up the hub Chapter 3 Understanding Indicators Describes all LED indicators on the hub s front panel Understand ing these indicators is essential to effectively using the hub Chapter 4 Making Connections Provides informa tion on connecting to the hub s twisted pair stacking hubs and linking with other 100BASE TX hubs Appendix A Cables and Connectors Provides specifi cations on the cables a...

Page 9: ...options from 16 to 190 The hub is IEEE 802 3u compliant and falls into the Class II Fast Ethernet hub type The ports on the hub are standard RJ 45 connectors for use with Category 5 UTP or STP cabling The hubs in the series available in 16 port and 24 port models can be stacked with up to four hubs in a stack A stack of four 24 port hubs gives a total of 96 Fast Ethernet ports A 16 24 port stackab...

Page 10: ...between any com puter and the hub with a maximum of 205 meters of cable between any two network nodes 16 or 24 100Mbps Fast Ethernet ports LED indicators for Power FX Link Rx 100M Activity 100M Collision and 100M Link Rx Scalable stack containing up to 4 units for a total 64 or 96 depending on model 100Mbps UTP STP ports Uplink port allows easy linking of two Fast Ethernet hub stacks to further ex...

Page 11: ... and carefully unpacks the contents The carton should contain the following items One Fast Ethernet 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 pro...

Page 12: ... 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 worksta tions or servers through these ports If you need to connect to another device with MDI X ports such as another hub or an Ethernet switch you should use a crossover cable or connect...

Page 13: ...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 2 port at the same time In 16 port model port 16 and the Uplink port is really the same port except that their pinouts are different Do not use both Port 16 and the Uplink port at the same time Rear Panel ...

Page 14: ...vi 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 below i...

Page 15: ... the hub stack in a site free from strong elec tromagnetic field generators 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 equip ment rack For information on rack installation see the next section Rack Mounting...

Page 16: ...mounted in an EIA standard size 19 inch rack which can be placed in a wiring closet with other equipment At tach the mounting brackets at the hub s front panel one on each side and secure them with the provided screws Then use screws provided with the equipment rack to mount each hub in the rack ...

Page 17: ...standing Indicators 11 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 stackable Fast Ethernet hub depicted be low ...

Page 18: ...rnet segments will blink green 100M Collision This indicators indicate data collisions on the respective 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 collisions span the entire net work segment Whenever a collision is detected the respective COL indicator will briefly blink amber 100BASE FX ...

Page 19: ...and indicator for link or receive status The following describes each indicator and the meaning of each condition 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 con nected 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...

Page 20: ......

Page 21: ...ng a Stack You can stack 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 96 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 ...

Page 22: ...bs 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 OFF power to the entire stack before adding or removing hubs Connectivity Rules Fast Ethernet 100Mbps networks have the following connectivity rules ...

Page 23: ... segments and two Class II hubs or hub stacks Hub to End Station Connection After installing the hub properly it can support up to 24 ports or 16 port end station connections Fast Ethernet connections re quire either a Category 5 UTP cable or a STP cable These cables can be up to 100 meters long Each Fast Ethernet connection requires a Category 5 cabling for all connections in order to make it eas...

Page 24: ...de Making Connections 18 When connecting a PC or a server the system being connected should have a Fast Ethernet network interface card with a twisted pair port The following figure shows a typical connection between the hub and end stations ...

Page 25: ... 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 rule is followed The following table describe...

Page 26: ...eater flexibility in how these hubs may be used in a network 100Base FX Module Installation The installation procedure for each module is the same Addi tional information about each module is provided below To install any of the modules Includes SC or ST type connectors 1 Locate the module slot in the hub s rear panel 2 Using a screwdriver undo the two screws and remove the dust cover on the modul...

Page 27: ...Fast Ethernet Stackable Hubs User s Guide Making Connections 21 We recommend that you retain the dust cover in case you need to remove the module for an extended period sometime in the future ...

Page 28: ......

Page 29: ...thernet 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 Category 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 ...

Page 30: ...nectors 24 Straight Twisted Pair Cable Pinouts Contact MDI X Signal MDI Signal 1 RD receive TD transmit 2 RD receive TD transmit 3 TD transmit RD receive 4 Not used Not used 5 Not used Not used 6 TD transmit RD receive 7 Not used Not used 8 Not used Not used ...

Page 31: ...le two pairs of wires are switched at one connector end Carry out the following steps to create a custom ized crossover twisted pair cable 1 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 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 ...

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Page 33: ... TX 100BASE FX Topology Star Protocol CSMA CD Network Data Transfer Rate 100Mbps Number of Ports 16 16 port model or 24 24 port model 100BASE TX ports Network Media 100BASE TX UTP STP Cat 5 100 ohm twisted pair 100m maxi mum 100BASE FX 62 5 125 micron multimode optical fiber ...

Page 34: ...cators Hub Status Power FX Link Rx 100M Activity 100M Collision Port Status per port 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 Emissions FCC Class A CE Safe...

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