Kingston Technology KND2415TX manual What are the Guidelines for Proper Termination?

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16	Appendix D Commonly Asked Questions

What are the Guidelines for Proper Termination?

It is important to maintain the twists of the cable as close to the termination on the outlet as possible, to avoid NEXT (Near End Cross Talk) and to maintain the transmissions characteristics of the Category. Category specications require that pair twisting be maintained to within the following distances from the outlet termination:

•Category 3 maximum allowed untwisting: 3 inches

•Category 4 maximum allowed untwisting: 1 inch

•Category 5 maximum allowed untwisting: 1/2 inch

Can I mix CAT 3 and CAT 5 cabling in the same building?

Yes, but keep in mind, you will not have CAT 5 performance. It is a good idea to keep the lines separated when installing any new lines. Use CAT 5 UTP cabling only.

Can a Four-Pair CAT 5 cable support two 100BASE-TX devices?

Although only two pairs are used in the standard four-pair CAT 5 UTP cable, it is not recommended because it exceeds the specications outlined by IEEE 802.3u.

Kingston Technology Company

KND2415TX User’s Guide - Rev. A00

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Contents PORT10/100TX KND2415TX Users Guide Rev. A00 Wichtige Sicherheitshinweise Important Safety InstructionsTable of Contents Kingston Technology Company KND2415TX IntroductionPackage Contents Special FeaturesDesign Features Power LED Hardware InstallationCollision LEDs 100TX Speed-Detection LEDsUplink Port 10/100TX UTP PortsAC Power Connector Power SwitchFuse Fan UnitsStacking Conguration Stack-In / Stack-Out PortsKingston Technology Company Appendices UTP Port Pin Assignments Appendix a Pin AssignmentsUTP Cable Wiring Appendix B Cabling GuidelinesUTP Cable Type Table B-4 4-Pair T568A Wiring UTP Cable Wiring StandardsTerms You Should Be Familiar With UTP Cable Rating CodesEnvironmental Appendix C SpecicationsAppendix D Commonly Asked Questions What is Category 5?Class J vs. Class JJ 100BASE-TX Fast Ethernet Repeaters Will 100BASE-TX run on Category 3 cable?What are the Guidelines for Proper Termination? Can I mix CAT 3 and CAT 5 cabling in the same building?Can a Four-Pair CAT 5 cable support two 100BASE-TX devices? Appendix E Mounting Templates Rubber Feet for DesktopsBrackets for Rack Mounting Limited Warranty Statement Duration of WarrantyAppendix F Warranties and Notices Warranty Claim Requirements Free Technical SupportDisclaimers C. Certication CE NoticeTick Certication