User manual SMC 8028L2

[. . . ] INSTALLATION GUIDE ta SMC8028L2 TigerSwitchTM 10/100/1000 28-Port Gigabit Ethernet Switch TigerSwitch 10/100/1000 Installation Guide From SMC's Tiger line of feature-rich workgroup LAN solutions 20 Mason Irvine, CA 92618 Phone: (949) 679-8000 Janurary 2010 Pub. # 150200000155A E012010-MW-R01 20 Mason Irvine, CA 92618 Phone: (949) 679-8000 Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable. However, no responsibility is assumed by SMC for its use, nor for any infringements of patents or other rights of third parties which may result from its use. [. . . ] Otherwise back pressure jamming signals may degrade overall performance for the segment attached to the hub. 3. Based on recommended standards, the length of fiber optic cable for a single switched link should not exceed: 1000BASE-SX: 550 m (1805 ft) for multimode fiber. 1000BASE-LX: 5 km (3. 1 miles) for single-mode fiber. 1000BASE-LH: 70 km (43. 5 miles) for single-mode fiber. However, power budget constraints must also be considered when calculating the maximum cable length for your specific environment. ­ 38 ­ 3 INSTALLING THE SWITCH SELECTING A SITE Switch units can be mounted in a standard 19-inch equipment rack or on a flat surface. Be sure to follow the guidelines below when choosing a location. The site should: be at the center of all the devices you want to link and near a power outlet. be able to maintain its temperature within 0 to 45 °C (32 to 113 °F) and its humidity within 10% to 90%, non-condensing provide adequate space (approximately two inches) on all sides for proper air flow be accessible for installing, cabling and maintaining the devices allow the status LEDs to be clearly visible Make sure twisted-pair cable is always routed away from power lines, fluorescent lighting fixtures and other sources of electrical interference, such as radios and transmitters. Make sure that the unit is connected to a separate grounded power outlet that provides 100 to 240 VAC, 50 to 60 Hz, is within 2 m (6. 6 feet) of each device and is powered from an independent circuit breaker. As with any equipment, using a filter or surge suppressor is recommended. ­ 41 ­ CHAPTER 3 | Installing the Switch Ethernet Cabling ETHERNET CABLING To ensure proper operation when installing the switch into a network, make sure that the current cables are suitable for 10BASE-T, 100BASE-TX or 1000BASE-T operation. Check the following criteria against the current installation of your network: Cable type: Unshielded twisted pair (UTP) or shielded twisted pair (STP) cables with RJ-45 connectors; Category 3 or better for 10BASE-T, Category 5 or better for 100BASE-TX, and Category 5, 5e or 6 for 1000BASE-T. Protection from radio frequency interference emissions Electrical surge suppression Separation of electrical wires (switch related or other) and electromagnetic fields from data based network wiring Safe connections with no damaged cables, connectors or shields Figure 8: RJ-45 Connections RJ-45 Connector ­ 42 ­ CHAPTER 3 | Installing the Switch Equipment Checklist EQUIPMENT CHECKLIST After unpacking this switch, check the contents to be sure you have received all the components. Then, before beginning the installation, be sure you have all other necessary installation equipment. PACKAGE CONTENTS Gigabit Ethernet Switch (SMC8028L2) Four adhesive foot pads Bracket Mounting Kit containing two brackets and eight screws for attaching the brackets to the switch Power Cord--either US, Continental Europe or UK RS-232 console cable This Installation Guide Management Guide CD OPTIONAL RACK-MOUNTING EQUIPMENT If you plan to rack-mount the switch, be sure to have the following equipment available: Four mounting screws for each device you plan to install in a rack--these are not included A screwdriver (Phillips or flathead, depending on the type of screws used) ­ 43 ­ Mounting CHAPTER 3 | Installing the Switch MOUNTING The switch can be mounted in a standard 19-inch equipment rack or on a desktop or shelf. Mounting instructions for each type of site follow. RACK MOUNTING Before rack mounting the switch, pay particular attention to the following factors: Temperature: Since the temperature within a rack assembly may be higher than the ambient room temperature, check that the rack-environment temperature is within the specified operating temperature range. (See page 74. ) Mechanical Loading: Do not place any equipment on top of a rack-mounted unit. Circuit Overloading: Be sure that the supply circuit to the rack assembly is not overloaded. Grounding: Rack-mounted equipment should be properly grounded. Particular attention should be given to supply connections other than direct connections to the mains. To rack-mount devices: 1. Attach the brackets to the device using the screws provided in the Bracket Mounting Kit. ­ 44 ­ CHAPTER 3 | Installing the Switch Mounting Figure 9: Attaching the Brackets 27 28 2. Mount the device in the rack, using four rack-mounting screws (not provided). Be sure to secure the lower rack-mounting screws first to prevent the brackets being bent by the weight of the switch. Figure 10: Installing the Switch in a Rack 27 28 ­ 45 ­ Mounting CHAPTER 3 | Installing the Switch 3. If installing a single switch only, turn to "Connecting to a Power Source" at the end of this chapter. 4. If installing multiple switches, mount them in the rack, one below the other, in any order. DESKTOP OR SHELF MOUNTING 1. [. . . ] Additionally, cables must also pass test parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, "The Additional Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling. " Note that when testing your cable installation, be sure to include all patch cables between switches and end devices. ­ 70 ­ APPENDIX B | Cables Fiber Standards ADJUSTING EXISTING CATEGORY 5 CABLING TO RUN 1000BASE-T If your existing Category 5 installation does not meet one of the test parameters for 1000BASE-T, there are basically three measures that can be applied to try and correct the problem: 1. Replace any Category 5 patch cables with high-performance Category 5e or Category 6 cables. 2. Reduce the number of connectors used in the link. [. . . ]