DESIGNING STRUCTURED CABLING SYSTEMS Anton Indrawata, RCDD, Dipl.Ing Regional Training Manager Elements Of The Design • Data transmission requirements • Cabling components and their installation • Pathway & Spaces where the cable is placed 8/16/2005 ADC Proprietary and Confidential Data Transmission Requirements • What applications? – – – – – – Windows or Mac applications with file transfers CAD or 3D modelling with file transfers Imaging or publishing work Medial or X-ray data transfers How many on the LAN? POTS or VoIP • What network components? – – – – PCs, NICs, file servers, network operating system Hubs, switches, routers Printers, scanners, industrial equipment Remote access, VPN • Growth allowance? – Own building – Long or short tenancy 8/16/2005 ADC Proprietary and Confidential Data Transmission Requirements • Ethernet most common LAN technology (over 25 years old) • IEEE 802.3 Carrier Sense Multiple Access with Collision Detection CSMA/CD: • • 3y 100BASE-T 3ab 1000BASE-T • 3z 1000BASE-SX -LX on on on on on Cat3 Cat5E Cat6 OF OF • Full Duplex with flow control methodology is industry preferred • Half Duplex is supported by only a few vendor specific gigabit products MAC = Media Access Control PHY = Physical Layer = OF or Cu 8/16/2005 ADC Proprietary and Confidential Cabling Components • Speed, Band Width, & Utilisation determine physical medium SMOF 9/125 Optical Fibre MMOF 50/125 62.5/125 Cat7, Class F Shielded Copper Cat6, Class E UTP Cat5E, Class D UTP Narrow Band Microwave Wireless Infrared Spread Spectrum 8/16/2005 ADC Proprietary and Confidential Cabling Components OF CABLING SYSTEM STRUCTURED CABLING Channels OF300 - 300m OF500 - 500m OF2000 - 2000m Made From of Cable OM1 OM2 OM3 OS1 APPLICATION SPECIFIC Application Fibre 62.5u 850nm 1300nm 9u 1310nm ATM155 1000m 2000m 2000m ATM622 300m 330m 2000m GBE 275m 550m 2000m Ref: ISO 11801 Table Ref: ISO 11801 Cl 8/16/2005 ADC Proprietary and Confidential Cabling Components ISO 11801 Channel Distance Table TYPE SIZE MMOF OM1 OM2 OM3 /125µ 50 or 62.5 50 or 62.5 50 OVERFILL LAUNCH BANDWIDTH MHz.km 850 nm 1300 nm 200 500 500 500 1500 500 EFFECTIVE LASER LAUNCH BANDWIDTH MHz.km 850 nm Not Specified Not Specified 2000 Table CHANNEL ETHERNET DISTANCE 10 Mbps 100 Mbps 1,000 Mbps 10,000 Mbps 300 m OM1 0M1 OM2* OM3 500 m OM1 OM1 OM2* OS1 2000 m OM1 OM2 OS1 OS1 *OM1 can be used with a wavelength of 1300nm, but OM2 gives a higher safety margin and is less sensitive to installation practices 8/16/2005 ADC Proprietary and Confidential Cabling Components Table KRONE Optical Fibre Recommendations SMOF @ 1310 & 1550nm distance depends on transmitter & receiver eg 15km if high power 10,000 Mbps 50/125u MMOF OM3 1500 MHz.km MBW @850nm 1,000 Mbps 9/125u SMOF @ 1310nm OS1 50/125u MMOF OM2 500 MHz.km Modal Band Width @ 850nm 50/125u MMOF OM2 500 MHz.km Modal Band Width @ 850nm 100 Mbps 62.5/125u MMOF OM1 200 MHz.km Modal Band Width @850nm 300m 8/16/2005 500m ADC Proprietary and Confidential km System Elements 8/16/2005 ADC Proprietary and Confidential 10 System Models Fig 11a Fig 11c Inter - Connect to TO Fig 11b Cross - Connect to TO 8/16/2005 Inter - Connect + CP Fig 11d Cross - Connect + CP ADC Proprietary and Confidential 11 How far on Backbone Copper? Table 8/16/2005 ADC Proprietary and Confidential 16 Spaces – Telecommunications Room TR • Building Floor Plans – Argue for central TR's, with risers, away from lifts – Argue for UPS & batteries well away from TR's – Argue for EMI sources well away from TR's – x Work Area / 10m2 (Usable floor space) • x TR / 1000m2 or when H > 90m (at 20oC) • TR size = x 3.4m (for 1000m2 floor) • TR Lighting = 500 lux at 1m above floor • Light fittings > 2.4m above floor 8/16/2005 ADC Proprietary and Confidential 17 Spaces – Equipment Room ER • ER size = 40m2 (for floors each 1000m2) • ER's contain active equipment generating heat • HVAC = 18 - 24°C with 30-50% relative humidity (measured 1.5m above finished floor) • Allow space for BAS equipment • Specific buildings (hotel, hospitals, laboratories, education) require ER size allocations based on work area numbers • UPS > 100kVA located in a separate room 8/16/2005 ADC Proprietary and Confidential 18 Pathways – Intra Building • Access Flooring: best solution for Equipment Rooms – minimum height = 300mm (ER with under-floor HVAC) – floor loading = 454kg dynamic (computer room, medium duty) = 1221kg static (computer room, medium duty) • Cable Trays: best solution for Pathway – Duct or Trunking – metal or plastic trough with cover – Open Tray – metal perforated or solid bottom – Ladder Tray – side rails with transverse members – Cable fixings – none on tray, 200mm on catenary, no J- Hooks – – 8/16/2005 Headroom above tray = 0.5 x tray width (after HVAC ducting) Strongly advised not to share cable trays to distribute telecommunications and power cables ADC Proprietary and Confidential 19 Pathways – Intra Building • Conduits: OK for suface fixing; Rare in concrete; – Label both ends of conduit with floor & room number – < 18m between pulling points – < x 90° bends per pulling section – must leave a 90kg pull cord • Surface Skirting Duct: Quite common – Locate TO in short removeable cover fittings – Multi channel metal skirting must be bonded to earth – Power on the bottom, Communications on the top – Insufficient space for Cat & minimum bend radius – Leave spare cable in ceiling; not in skirting duct 8/16/2005 ADC Proprietary and Confidential 20 Pathways – Intra Building • Vertical Pathways: – Use sleeves and/ or slots between floors – Install firestopping in sleeves and slots – Conduit shall NOT be used for vertical pathways except for sleeves and must be < 800mm – Fix pair cables to support tray at 500mm on vertical tray (no fixing on horizontal tray and 200mm on horizontal catenary) – Use Velcro ties for Cat & and closer fixing if necessary – No cabling in lift shafts – Conduit fill rate = 40% (for > cables) 8/16/2005 ADC Proprietary and Confidential 21 ... Spectrum 8/16/2005 ADC Proprietary and Confidential Cabling Components OF CABLING SYSTEM STRUCTURED CABLING Channels OF300 - 300m OF500 - 500m OF2000 - 2000m Made From of Cable OM1 OM2 OM3 OS1 APPLICATION... with 12m Work Area leads? 88m + 12m = 100m Therefore OK? Wrong! H = 105 - FX - CY = 105 - (12+5)x1.5 - 5x1 = 105 - 25.5 - = 74.5m 8/16/2005 ADC Proprietary and Confidential 14 How far on Horizontal... 40°C What should H be now? Fixed Cabling, CP Link length has changed from 88m to 68.5m H2 = H1 - 0.4% per °C above 20°C = 74.5 - 0.4% x (4 0-2 0) = 74.5 - 8% = 74.5 - = 68.5m 8/16/2005 ADC Proprietary