User manual SMC 9712P

[. . . ] 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. No license is granted by implication or otherwise under any patent or patent rights of SMC. SMC reserves the right to change specifications at any time without notice. Copyright © 2011 by SMC Networks No. 1, Creation Road III, Hsinchu Science Park, 30077, Taiwan, R. O. C. [. . . ] The standard power inlet is for the AC power cord. Figure 4: Power Supply Inlet AC 100-240Vac, 50~60Hz, 1. 7A Power Supply Inlet GROUNDING POINT To prevent accidental electrical shock or damage to your switch, it is recommended that you ground the switch to an earth point by attaching a grounding wire (not supplied) to the grounding point located on the rear panel, with a metal screw. If located in a tall building, grounding points include metal drain pipes, and other electrostatic conductive devices that lead to the ground, or if located on the first floor of a building, the ground outside itself. ­ 27 ­ CHAPTER 1 | Introduction Overview Figure 5: Grounding Point AC 100-240Vac, Grounding Point RESET BUTTON If you encounter any switch malfunctions, such as a hang or non-recoverable error, you might want to reset the switch to its default configuration by pressing and holding the reset button for more than 10 seconds. The reset button is located on the front panel. Figure 6: Reset Button / Reset Button ­ 28 ­ Overview CHAPTER 1 | Introduction ­ 29 ­ 2 NETWORK PLANNING INTRODUCTION TO SWITCHING A network switch allows simultaneous transmission of multiple packets via noncrossbar switching. This means that it can partition a network more efficiently than bridges or routers. The switch has, therefore, been recognized as one of the most important building blocks for today's networking technology. When performance bottlenecks are caused by congestion at the network access point (such as the network card for a high-volume file server), the device experiencing congestion (server, power user, or hub) can be attached directly to a switched port. And, by using full-duplex mode, the bandwidth of the dedicated segment can be doubled to maximize throughput. When networks are based on repeater (hub) technology, the distance between end stations is limited by a maximum hop count. However, a switch turns the hop count back to zero. So subdividing the network into smaller and more manageable segments, and linking them to the larger network by means of a switch, removes this limitation. A switch can be easily configured in any Ethernet, Fast Ethernet, or Gigabit Ethernet network to significantly boost bandwidth while using conventional cabling and network cards. APPLICATION EXAMPLES The switch is not only designed to segment your network, but also to provide a wide range of options in setting up network connections. Avoid using flow control on a port connected to a hub unless it is actually required to solve a problem. Otherwise back pressure jamming signals may degrade overall performance for the segment attached to the hub. 3. As a general rule 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: 10 km (6. 2 miles) for single-mode fiber. ­ 34 ­ CHAPTER 2 | Network Planning Application Notes 1000BASE-LH: 80 km (50 miles) for single-mode fiber. 100BASE-FX: 20 km (12 miles) for single-mode fiber. However, power budget constraints must also be considered when calculating the maximum cable length for your specific environment. ­ 35 ­ 3 INSTALLING THE SWITCH This chapter describes how to install the switch. SELECTING A SITE 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 50 °C (32 to 122 °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. ­ 36 ­ 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 12: RJ-45 Connections RJ-45 Connector ­ 37 ­ 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. [. . . ] Using your building's floor plans, draw a map of the location of all networkconnected equipment. For each piece of equipment, identify the devices to which it is connected. Note the length of each cable and the maximum cable length supported by the switch ports. For ease of understanding, use a location-based key when assigning prefixes to your cable labeling. [. . . ]