UT 2 Transmission Media
Topics in this Unit merican ational tandards nstitute ()/ Telecommunications ndustry ssociation (T) 568 standard nternational Organization for tandardization (O)/ nternational lecrotechnical Commission (C) 11801 international standard ational lectrical Code (C) Discuss the role of different standard organizations
tructured Cabling ystem
tructured Cabling ystem Problems with early cable systems Vendor specific Upgrades required new systems imple moves required major reconfigurations everal cable systems used for network connections Difficult and time consuming to troubleshoot
tandards and pecifying Organizations merican ational tandards nstitute () Mission is to encourage voluntary compliance with standards and methods Facilitates the development of these standards ncludes a wide range of standards lectronics ndustries lliance () epresents a variety of electronics manufacturers Works in conjunction with the T Telecommunications ndustry ssociation (T) Mission i is to represent issues relating to tandards, d public policy and market development Membership manufactures all telecommunications equipment Trade organization that consists of 1100 telecommunications and electronics companies T Committees
tandards and pecifying Organizations nsulated Cable ngineers ssociation (C) oal is to produce cable specifications for telecommunications, electrical power, and control cables mportant role in relation to standards for network cabling infrastructure ational Fire Protection ssociation (FP) Founded to protect people, property and environment from fire damage esponsible for the development and publication of the ational lectrical Code (C) ection 725 and 800 relate to data cabling
tandards and pecifying Organizations ational lectrical Manufactures ssociation (M) Promotes the standardization of electrical components, power wires, and cables Federal Communications Commission (FCC) Has the power to regulate electrical communications systems in the U.g. TV, radio, telephone, telegraph, cable, networks Underwriters aboratories (U) Organization dedicated to product safety testing and certification U mark is applied to cabling worldwide
tandards and pecifying Organizations nternational Organization for tandardization (O) nternational ti organization of national specifications epresents 130 countries around the world nternational lectrotechnical Commission (C) Publishes specifications related to electrical, electronic, and related technologies Mission is to promote standards relating to electricity and electronics nstitute t of lectrical l and lectronic ngineers () esponsible for 30 % of all technical literature published esponsible for the development of over 800 specifications, e.g. 802.x eries
tandards and pecifying Organizations ational nstitute of tandards and Technology (T) oals are to include assisting in the improvement and development of manufacturing technology, product reliability and scientific discovery Consists of 4 major programs - page 71 nternational Telecommunications Union (TU) Mission is to study the technical and operations issues relating to telecommunications Publishes recommendations for specifications Canadian tandards ssociation nternational (C) imilar to the U in the U
tandards and pecifying Organizations uropean Telecommunications tandards nstitute (T) Mission is to determine and produce telecommunications specifications and encourage worldwide standardization Building ndustry Consulting ervices nternational (C) Founded to support telephone company consultants that are responsible for the design and implementation ti of communications networks Offers a certification program called egistered Communications Distribution Designer (CDD) Occupational afety and Health dministration (OH) oal is to make all workplaces in the U safe
/T/-568-B Cabling tandard First published in 1991 //T- 568-1991 evised in 1995 /T/-568- Purpose stablish cabling specifications i Provide direction and design for commercial organizations upports data and voice Provide technical and performance guidelines
/T/-568-B Cabling tandard evised again in 2001 /T/- 568-B to include the following amendments: Propagation delay and delay skew Corrections to previous version Define bundled, hybrid, and composite cables XT loss testing Performance specifications for four-pair cable
/T/-568-B Cabling tandard ubsystems of structured cabling Minimum requirements nstallations ti methods Connector/ pin assignments ife span greater than 10 yrs Media types ecommended topology and distances Definition of cabling elements
/T/-568-B Cabling tandard Current breakdown 568-B.1 - eneral requirements 568-B.2 Balanced twisted-pair cabling components 568-B.2-1 Cat. 6 cabling 568-B.3 Optical fiber cabling components
/T/-568-B Cabling upports seven standards Horizontal Cabling Backbone cabling Work area Telecommunications room quipment room ntrance facility dministration i ti
ubsystem of a tructured Cabling ystem Horizontal Cabling Cable from patch panel to work area Telco outlets Cable terminations Cross-connections One transition point Maximum length 100 meters 90 meters for cable 10 meters for 2 patch cables
Cross-Connections Connections
How ot To Wire
W How ot To Wire
ittle Bit Better
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ubsystem of a tructured Cabling ystem animation
ubsystem of a tructured Cabling ystem Transition Point Multi-user telecommunications ti outlet t assembly (MO) Consolidation Point (CP) ecognized Media P or ctp 4pair, 100 ohm, 24 W, solid conductor twisted pair Optical fiber Two-fiber, 62.5/125-micron 50/125 micron Telecommunications Outlets One for voice, one for data Must be wired to a standard T568 T568B
ubsystem of a tructured Cabling ystem
J45 568 Cable pecs Pair 1 4& 5 Pair 2-3 & 6 Pair 3 1 & 2 Pair 4-7 & 8 J45 pecs
Backbone Cabling Between equipment rooms and building- entrance facilities Between buildings Vertical connections between floors rounding requirements voiding M/F Cross-connects Two levels l allowed Main cross connect Horizontal cross connect
Backbone Cabling 30 meters or less for equipment connections to backbone 90 meters total t for backbone distance used for high-speed applications Bridge taps or splices not allowed May use greater than 4 pair if additional requirements are meet, e.g. PXT ecognized Media Table 2.4
Backbone Cabling
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Work rea Cabling ubsystem Where the horizontal cable terminates dapters may be used, external to outlet t Connects to station equipment Telecommunications rooms ocation where cabling components such as patch panels and cross connects are located Place where the horizontal cabling originates Contains hubs, switches, routers etc.
ntrance Facility Cabling ubsystem Point in the building where cable interfaces with the outside world May share the space with the equipment room
animation Cabling ubsystem
Cabling ubsystem quipment room Place that contains more sophisticated equipment than the Telco. room or the entrance facility Backbone cabling terminates in this room May be Telco. and equipment room in small organizations May house servers, routers, and telephone equipment
Media & Connecting Hardware Performance 100 ohm -P Patch cables/cross connect jumpers Optical Fiber Multimode fiber 62.5/125 or 50/125 micron ingle-mode fiber 8.7/125 micron Optical Telecommunications rooms Must be able to terminate two fibers Means for securing fiber tore one meter of fiber
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nixter Cable Performance evels tandards set by nixter Corp to provide a standard for Vendors Five levels of standard are: evel 1 supports telephone voice grade use evel 2 supports low speed data evel 3 supports 10 Mbps thernet or 4/16 Mbps Token ing evel 4 - supports 20 MHz applications or 16 Mbps Token ing evel 5 - supports 100 MHz
nixter Cable Performance evels ew levels forthcoming evel 5 - supports 200 MHz evel 6 - supports 350 MHz evel 7 - supports 400 MHz lso, all components must be certified to the same level as the cable at these levels l nterprise Cabling olutions
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Other Cabling Technologies BM Cabling ystem vaya YTMX connect ODX/CDT
Type 1 Type 2 Type 3 Type 5 Type 6 Type 8 Type 9 BM Cable Types
BM Data Connector
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ab 2 Use wire strippers, wire cutters and crimpers Make a 568B to 568B straight through cable using CT 5 cable Make a 568 to 568B straight through h cable Then test them to see if they work.