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When connecting more than two hubs via TP ports and UTP cables,
it is important to minimize the number of hubs in any path of the
network.

You may select one hub to serve as a primary hub to which other
hubs will be connected. This will minimize the number of hubs in any
path (node to node) on the network. The following figure illustrates
an example of connection topology:

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Summary of Contents for DH-8T

Page 1: ...Installation Guide 10Base T Ethernet Hub Model DH8T DOC 980213 DH8T K P N 750 0104 001 ...

Page 2: ...ght to revise this documentation and to make changes in content from time to time without obligation on the part of KTI Networks Inc to provide notification of such revision or change For more information contact UnitedStates KTI Networks Inc P O BOX631008 Houston Texas 77263 1008 Phone 713 2663891 Fax 713 2663893 BBS 713 2663015 E mail kti ktinet com Web http www ktinet com International Fax 886 ...

Page 3: ... equipment 2 Shielded interface cables and AC power cord if any must be used in order to comply with the emission limits CISPR A COMPLIANCE This device complies with EMC directive of the European Community and meets or exceeds the following technical standard EN 55022 Limits and Methods of Measurement of Radio Interference Characteris tics of Information Technology Equipment This device complies w...

Page 4: ...10BASE T ETHERNET HUB INSTALLATION GUIDE DOC 980214 DH8T NK P N 750 0104 002 ...

Page 5: ...g AC Power 3 Chapter 3 Making Network Connection Network Connectors 4 Connecting to an Ethernet Node 5 Hub to Hub Connection via UTP Cable 6 Chapter 4 Interpreting Hub LEDs Locations of the Hub LED Indicators 8 Interpretation 8 Appendix Specifications 10 RJ 45 Jack Pin Assignments 10 UTP Cabling Specifications 11 ...

Page 6: ...than a bus Each port on the hub connects to only one 10Base T device via unshielded twisted pair UTP cable The hub provides eight Twisted Pair TP ports RJ 45 Jacks and one 12V DC power socket on the rear panel On the front panel there are ten LED indicators for displaying the port status and the hub status The following figure illustrates the front panel and rear panel of the hub 1 ...

Page 7: ...rd straight through 10Base T UTP cable can be used for the hub to hub connection Each TP port has one Link Rx LED to indicate the link and receiving activity status of the UTP link segment Each TP port can detect and correct wiring polarity reversal automatically Two LEDs are provided to indicate other activities of the hub Power LED Power status CollisionLED Network collision status 2 ...

Page 8: ...king AC Power One AC power adapter is contained in the hub package Before you begin the installation check the AC voltage of your area The AC power adapter which is used to supply the DC power for the hub should have the AC voltage matching the commercial power voltage at your area The specifications of the AC power adapter are AC input power AC power voltage of your area DC output power 12 VDC 50...

Page 9: ... the jack labeled 8 is an alternative jack which is configured as MDI jack for the TP port 8 Both jacks can not be used at the same time The MDI X jacks can support connections to 10Base T Ethernet nodes or lower level hubs via 10Base T UTP cables The MDI jack 8C is used for connecting to an upper level hub A 10Base T UTP cable can be a Category 3 4 or 5 unshielded twisted pair cable with an RJ45 ...

Page 10: ...ernet adapter 3 Connect the other end of the UTP cable to an available MDI X jack on the hub It is better to reserve jack 8 for a connection to another hub Make sure that the connector on the cable is wired appropriately for the standard 10Base T node The straight through connection should be made from the node through the cable and connectors to the hub Refer to Appendix RJ 45 Jack Pin Assignment...

Page 11: ... nodes into one network You may connect one hub to another hub by using an ordinary UTP cable as the following steps 1 Connect one end of the UTP cable to the jack labeled 8C of Hub A 2 Connect the other end of the cable to any available MDI X jack of Hub B The maximum length of the UTP cable connecting two hubs is 100 meters 6 ...

Page 12: ...nimize the number of hubs in any path of the network You may select one hub to serve as a primary hub to which other hubs will be connected This will minimize the number of hubs in any path node to node on the network The following figure illustrates an example of connection topology 7 ...

Page 13: ... LED Eight Link and activity status LEDs One for each TP port Interpretations Power LED The LED indicates the status of the hub s power source Match the activity of the LED with one of the states indicated in the table State Indication Interpretation On Normal The power of the hub is on Off Problem No power is being supplied to the hub 8 ...

Page 14: ... increase Link Rx LED Each TP port has one Link Rx LED to indicate the link status and receiving activities of the connection to the attached device State Indication Interpretation On Normal the UTP link is in good condition and no receiving activities are present Blink Normal the UTP link is in good condition and there receiving activities are present Off Normal No active device is connected at t...

Page 15: ...5 Jack Pin Assignments The following illustrations indicate the pin assignments of the RJ 45 jacks on the hub Jacks 1 8 Jack 8C Pin Jack Assignment Jack Assignment 1 INCOMINGDATA1 OUTGOINGDATA1 2 INCOMINGDATA1 OUTGOINGDATA1 3 OUTGOINGDATA1 INCOMINGDATA1 4 No Connection No Connection 5 No Connection No Connection 6 OUTGOINGDATA1 INCOMINGDATA1 7 No Connection No Connection 8 No Connection No Connect...

Page 16: ...tegory 3 4 or 5 unshielded twisted pair cable The maximum length supported by the Ethernet is 100 meters of UTP cable The cable quality distance and connectors must comply with the EIA TIA 568 Commercial Building Wiring Standard The following figure illustrates the cable types used for different con nections 11 ...

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