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Installation Issues for Converged AV/IT Systems

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The success of a converged AV/IT system is dependent on a properly installed and tested structured cabling system. As more and more audiovisual integrators are offering IT infrastructure installation to their clients, it is mandatory that they have an understanding of the hardware and test procedures required. This seminar explores the hardware and installation equipment necessary to install and terminate UTP cabling, including punch blocks on patchbays and wallplates, and RJ-45 connectors on cabling. Structured cable installation issues such as cable pathways, signal interference, and distance limitations are covered. Finally, test parameters and equipment including cabling verification testing and network certification testing are demonstrated.

Presented by Tom Kehr
© AVIXA

Published in: Technology
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Installation Issues for Converged AV/IT Systems

  1. 1. 1 © 2017 AVIXA Installation Issues for Converged AV/IT Systems
  2. 2. 2 © 2017 AVIXA Objectives • Contrast IT and AV design • Examine physical IT topology • Identify acceptable IT terminations • Examine testing requirements
  3. 3. 3 © 2017 AVIXA Agenda • Professionals • Standards • Terminology • Convergence • Project Coordination • Unique Hardware • Terminations • Testing the system
  4. 4. 4 © 2017 AVIXA Working with IT • Specific means of documentation • International standards and references –TIA/EIA, ISO, IEEE, IETF, ITIL • Industry standard construction methods: –TIA, BICSI • Conservative new technology adoption • Content is mostly information • Only one or two cabling types, connectors, standardized  termination It’s only Data
  5. 5. 5 © 2017 AVIXA Working with AV • Non‐standard documentation • Lack of standards • Proprietary techniques • Constantly adopting new technologies • Many different types of content • Whatever cable and connector works
  6. 6. 6 © 2017 AVIXA IT Concerns • Minimal downtime • Scheduled maintenance / backups • Unified “build” of computers • Network / data security • Help Desk / Trouble tickets
  7. 7. 7 © 2017 AVIXA Signals • Microphone • Line level • Loudspeaker • HDTV (ATSC) • HDMI, DisplayPort, Thunderbolt • HDBaseT • SDI and its variants • Control (Contact closure, TTL, serial,  IR) • RF • USB, USB‐C • AV over IP (Proprietary except for  AVB/TSN) • Ethernet – IEEE 802 • Faster speeds • Protocols • Fiber optic
  8. 8. 8 © 2017 AVIXA Audiovisual over IP
  9. 9. 9 © 2017 AVIXA The Shift • RS‐232 • Telephony (ISDN) • SIP • H.323 • Ethernet • IP
  10. 10. 10 © 2017 AVIXA Traditional
  11. 11. 11 © 2017 AVIXA Hybrid
  12. 12. 12 © 2017 AVIXA Now Courtesy Belden
  13. 13. 13 © 2017 AVIXA Structured Cabling System • ITS infrastructure • Cables and connecting hardware • Work areas • Horizontal and Backbone distribution • Telcom spaces • Power • Field testing • Standardization of the cabling installation!
  14. 14. 14 © 2017 AVIXA TIA-569-D • Entrance Facility (EF) / Distributor Room (DR) • Backbone pathways and cabling • Cross‐connect facilities  • Telecommunications Rooms (TRs) • Horizontal pathways and cabling • Work areas • Outlets
  15. 15. 15 © 2017 AVIXA Entrance Facility / Distribution Room •Entrance Facility (EF) –Telecommunications service entrance Demarc –Backbone pathways between buildings •Distribution Room (DR) –Formerly called the Equipment Room –Routers, switches, servers
  16. 16. 16 © 2017 AVIXA Backbone Pathways and Cabling • Cabling between Equipment Rooms and Building Entrance  Facilities • Vertical connections between floors
  17. 17. 17 © 2017 AVIXA Telecommunications Room • Wiring originates from patch panels or punch‐down blocks in  the TR and extends to wall jacks • Common cross connect between backbone and horizontal  pathways • Contains switches and routers
  18. 18. 18 © 2017 AVIXA Terminations • AV –Field termination ‐ all custom –Few Premade –Crimp –Compression –Solder –RJ45 IDC –Fiber optic • IT –Punch‐down IDC –Premade patch cables –Fiber optic –No field terminations of RJ‐45s
  19. 19. 19 © 2017 AVIXA Audiovisual and IT Coordination •Unusual locations for information outlets •Network segregation –VPNs –Subnets •Real‐time traffic •Firewalls –Ports
  20. 20. 20 © 2017 AVIXA Field Testing – Why? •Reveals the quality and performance of the installation –Verifies that the installation meets: Industry standards Network requirements •Reduces costly rework •Eliminates the blame game
  21. 21. 21 © 2017 AVIXA Field Testing – Why?
  22. 22. 22 © 2017 AVIXA Field Testing •Discover the requirements –ISO/IEC 11801 (Class) –ANSI/TIA‐568‐D (Category) •Test / Certify •Troubleshoot •Document
  23. 23. 23 © 2017 AVIXA Field Testing •Wiremap –Is it wired correctly? •Length –Link or channel? •Insertion Loss (Attenuation) •Crosstalk •Return Loss
  24. 24. 24 © 2017 AVIXA Cable Length •Link –Excludes test and patch cords –Cable segment including terminations –Twisted pairs no more than 295 ft. (90 m) •Channel –End‐to‐end path including the devices attached to the cable –Twisted pairs no more than 328 ft. (100 m)
  25. 25. 25 © 2017 AVIXA Insertion Loss •a.k.a. Attenuation Freq. (MHz) Max. Attenuation (dB/100m) Min. NEXT (dB) 300 34.5 43.2 350 37.7 42.1 400 40.6 41.3 450 43.5 40.5 460 44.0 40.4
  26. 26. 26 © 2017 AVIXA Crosstalk •NEXT – Near End Crosstalk –Ability to reject crosstalk form an  adjacent pair at the transmitting  end •FEXT – Far End Crosstalk –Measurement of how the far end  of one pair affects the near end of  another pair
  27. 27. 27 © 2017 AVIXA Attenuation to Crosstalk Ratio (ACR)
  28. 28. 28 © 2017 AVIXA Return Loss (RL) •Changes in impedance in the cable path –Different cable construction – solid vs. stranded –Mismatched cable and connectors –Untwisting of wire pairs –Separating wire pairs –Changes in cable geometry due to deformation Use of nylon ties Exceeding cable bend radius
  29. 29. 29 © 2017 AVIXA What happens if we don’t test?
  30. 30. 30 © 2017 AVIXA That’s All!

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