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32 www.commscope.com TABLE 4: TIA SUPPORTABLE DISTANCES Application Parameter Nominal wavelength (nm) Ethernet 10/100BASE-SX Ethernet 100BASE-FX Ethernet 1000BASE-SX Ethernet 1000BASE-LX Ethernet 10GBASE-S Ethernet 10GBASE-LX4 Ethernet 10GBASE-L Ethernet 10GBASE-LRM Fibre Channel 100-MX-SN-I (1062 Mbaud) 62.5/125 µm TIA 492AAAA (OM1) Multi-mode Single-mode 50/125 µm 850 nm TIA 492CAAA laser- optimized (OS1) 50/125 µm TIA 492AAAB TIA 492AAAC TIA 492CAAB (OM2) (OM3) (OS2) 850 1300 850 1300 850 1300 1310 1550 Channel attenuation (dB) 4.0 - 4.0 - 4.0 - - - Supportable distance m (ft) 300 (984) - 300 (984) - 300 (984) - - - Channel attenuation (dB) - 11.0 - 6.0 - 6.0 - - Supportable distance m (ft) - 2000 (6560) - 2000 (984) - 2000 (984) - - Channel attenuation (dB) 2.6 - 3.6 - 4.5 - - - Supportable distance m (ft) 275 (900) - 550 (1804) - 800 (2625) - - - Channel attenuation (dB) - 2.3 - 2.3 - 2.3 4.5 - Supportable distance m (ft) 550 (1804) - 550 (1804) - 550 (1804) 5000 - (16405) Channel attenuation (dB) 2.4 - 2.3 - 2.6 - - - Supportable distance m (ft) 33 (108) - 82 (269) - 300 (984) - - - Channel attenuation (dB) - 2.5 - 2.0 - 2.0 6.3 - Supportable distance m (ft) - 300 (984) - 300 (984) - 300 (984) 10000 - (32810) Channel attenuation (dB) - - - - - - 6.2 - Supportable distance m (ft) - - - - - - 10000 (32810) - Channel attenuation (dB) - 1.9 - 1.9 - 1.9 - - Supportable distance m (ft) - 220 (720) - 300 (984) - 300 (984) - - Channel attenuation (dB) 3.0 - 3.9 - 4.6 - - - Supportable distance m (ft) 300 (984) - 500 (1640) - 860 (2822) - - - Optical distances Optical components that meet TIA standards should be able to meet the distances given within Table 4. There are a few key points to highlight though. There are 3 types of multimode fiber described 62.5 μm (OM1), 50 μm and laser-optimized 50 μm (OM3). So one cannot simply ask what is the distance for “multimode” fiber when evaluating a solutions capability. In most data center applications today, OM3 fiber will be required for its capability to provide 10 G/s speeds over a 300 meter distance. Additionally, an “enhanced” OM4 fiber, not shown in this table, is commonly available today and will provide longer 10G distances, out to 550 meters. The standards offer a convenient look at the capability of the media, but this “one-number” has great limitations. On the copper side, the table does not provide an estimate of the available bandwidth performance headroom. If a high-bandwidth Category 6 cable is utilized, there may be headroom to spare, but Category 5e cabling may be barely sufficient. On the fiber side, the distances are provided with the assumption that the distance is point to point. This means that there are no interconnects, cross-connects or splices within the link. Most systems are more complicated than this, however, and the extra loss associated with a crossconnect must be accounted for as a potentially shortened distance.
Another assumption that the standard makes is that all products are “worst case.” The electronics have the worst case source characteristics, the optical fiber has the worst dB/km attenuation and the connectors have the worst case insertion loss at 0.75 dB per connector pair. This worst case planning methodology ensures that any mix of standards-compliant components will work at the distance denoted, but it does limit the potential length and/or configuration of the system. Although you can follow the standard recommended distances for a point to point or 2 connection system, one is left to calculate what the distance and loss budgets would be for links for more than 2 connections. CommScope can supply derating tables that provide the distance that can be achieved based on a specific system’s characteristics. These tables can be found at www.mycommscope.com and are broken out into three Performance Specifications <strong>Guide</strong>s: 1. Copper 2. Optical Fiber 3. MPO / InstaPATCH ® solutions. These guides provide information on a multitude of systems, including Ethernet, Fibre Channel, InfiniBand and more. Let’s look at one example to see how to use these guides. A data center is utilizing MPO trunks with OM3 fiber to connect a Server to a LAN switch; both of the electronics are located in separate EDAs and link through a cross-connet at the MDA. LC/MPO modules are utilized at all locations, with LC patch cords connecting to the equipment and also used for the cross-connect point. Step 1: The application is 10 Gigabit Ethernet. Because the application includes MPO connections, the InstaPATCH ® solutions document would be used for reference. Step 2: Within that guide, find the table corresponding to 10G-SX Ethernet LC connections OM3 (LazrSPEED ® 300) fiber Step 3: Add up the number of LC and MPO connections. Within the cross-connect included, there will be four LC and four MPO connections. (Ignore connectors that are plugged directly into the electronics ports.) Step 4: From the table, choose the value that intercepts the column for four LC connections and the row for four MPO connections. In this case, the distance is 260 meters. If this distance is greater than the design requires, then you have confirmed that this solution will work well for the application. If this distance is too short, go to Step 5. TABLE 5: 10G ETHERNET OVER LAZRSPEED ® 300 WITH LC CONNECTIONS # LC Connections with: 1 MPO 2 MPOs 3 MPOs 4 MPOs 5 MPOs 0 980 (300) 980 (300) 940 (285) 890 (270) 840 (255) 1 980 (300) 980 (300) 940 (285) 890 (270) 790 (240) 2 980 (300) 940 (285) 890 (270) 840 (255) 790 (240) 3 980 (300) 940 (285) 890 (270) 790 (240) 740 (225) 4 940 (285) 890 (270) 840 (255) 790 (240) 690 (210) 5 940 (285) 890 (270) 790 (240) 740 (225) 690 (210) 6 890 (270) 840 (255) 790 (240) 690 (210) 640 (195) www.commscope.com 33
Page 1 and 2: www.commscope.com CommScope ® Ente
Page 3 and 4: 1. Introduction Today the Data Cent
Page 5 and 6: CommScope Connectivity Meets and Ex
Page 7 and 8: 2. Standards And Regulations The be
Page 9 and 10: Other Resources The Uptime Institut
Page 11 and 12: 3. Network Topology Simply defined,
Page 13 and 14: 4. Network Architecture Network arc
Page 15 and 16: Figure 3: Distributed Architect Cor
Page 17 and 18: Data Center Areas The Entrance Room
Page 19 and 20: 6. Electronics Network Equipment Th
Page 21 and 22: Common Port Counts It is helpful to
Page 23 and 24: Fortunately, VCSELs can be tested a
Page 25 and 26: Figure 8: Digital Signal Processing
Page 27 and 28: Instead of utilizing many single-fi
Page 29 and 30: One of the main issues to consider
Page 31: Application Distances TIA/EIA-568C.
Page 35 and 36: 8. Transmission Media The media use
Page 37 and 38: Figure 14: PSACR for U/UTP Channels
Page 39 and 40: It has been estimated that approxim
Page 41 and 42: The 90 meters of 1 Gb/s horizontal
Page 43 and 44: Tight Buffered Fiber Optic Cable Co
Page 45 and 46: 9. Passive Cabling Products The des
Page 47 and 48: Fiber Optic Cables and Components P
Page 49 and 50: Fiber Optic Connectors While many f
Page 51 and 52: Note that a TIA568B.1 compliant pat
Page 53 and 54: Preterminated solutions in the data
Page 55 and 56: Intelligent Infrastructure Solution
Page 57 and 58: Intelligent Buildings Building Auto
Page 59 and 60: BAS Design Guidelines Above Layer 1
Page 61 and 62: One BAS application where IP-based
Page 63 and 64: Figure 29: Composite Baseband Video
Page 65 and 66: A digital CCTV system using IP came
Page 67 and 68: The distances supported will depend
Page 69 and 70: 11. Power In The Data Center When d
Page 71 and 72: U.S. military power quality standar
Page 73 and 74: Data Center Electrical Efficiency F
Page 75 and 76: Figure 37: Step Down Process Phase
Page 77 and 78: Figure 40: Location of Power and Da
Page 79 and 80: After reducing the number of server
Page 81 and 82: Separation of supply and exhaust ai
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Data Center Availability The TIA-94
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Table 2 summarizes the benefits and
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Computer Room Layout There is no ha
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The rack placement of hot or temper
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When using the raised floor as a co
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The amount of weight a raised floor
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used at the angles of the conveyanc
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If using a polish-type connector Fo
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The electronics can be installed in
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Performance Standards TABLE 16: CAT
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and test the link from the opposite
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Fiber optic links should be tested
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TABLE 19: TIA 568 C COMPONENT AND L
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Documentation Every link should be
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Backbone Raceway the portion of the
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Count Loop Diversity loop diversity
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F/UTP a 100 ohm cable with an overa
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Loss energy dissipated without acco
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Positive Contact or Physical Contac
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Terminal a point at which informati
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