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SMC Networks 8028L2 Installation Manual

10/100/1000 28-port gigabit ethernet switch
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INSTALLATION GUIDE

ta
SMC8028L2
TigerSwitch
TM
10/100/1000
28-Port Gigabit Ethernet Switch

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  • Page 1: Installation Guide

    INSTALLATION GUIDE SMC8028L2 TigerSwitch 10/100/1000 28-Port Gigabit Ethernet Switch...
  • Page 3 TigerSwitch 10/100/1000 Installation Guide From SMC's Tiger line of feature-rich workgroup LAN solutions 20 Mason Janurary 2010 Pub. # 150200000155A Irvine, CA 92618 E012010-MW-R01 Phone: (949) 679-8000...
  • Page 4 20 Mason Irvine, CA 92618 Phone: (949) 679-8000...
  • Page 5 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.
  • Page 6 ARRANTY AND RODUCT EGISTRATION To register SMC products and to review the detailed warranty statement, please refer to the Support Section of the SMC Website at http:// www.smc.com.

  • Page 7: Compliances And Safety Statements

    OMPLIANCES AND AFETY TATEMENTS FCC - C LASS This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 8 OMPLIANCES AND AFETY TATEMENTS CE M (EEC) ECLARATION OF ONFORMANCE FOR AFETY This information technology equipment complies with the requirements of the Council Directive 89/336/EEC on the Approximation of the laws of the Member States relating to Electromagnetic Compatibility and 73/23/EEC for electrical equipment used within certain voltage limits and the Amendment Directive 93/ 68/EEC.
  • Page 9 OMPLIANCES AND AFETY TATEMENTS AFETY OMPLIANCE Warning: Fiber Optic Port Safety When using a fiber optic port, never look at the transmit laser while it is powered on. Also, never look directly at the CLASS I fiber TX port and fiber cable ends when they are powered LASER DEVICE Avertissment: Ports pour fibres optiques - sécurité...
  • Page 10 OMPLIANCES AND AFETY TATEMENTS OWER AFETY Please read the following safety information carefully before installing the switch: Installation and removal of the unit must be carried out by qualified WARNING: personnel only. The unit must be connected to an earthed (grounded) outlet to comply with ◆...
  • Page 11 OMPLIANCES AND AFETY TATEMENTS Power Cord Set U.S.A. and Canada The cord set must be UL-approved and CSA certified. The minimum specifications for the flexible cord are: - No. 18 AWG - not longer than 2 meters, or 16 AWG. - Type SV or SJ - 3-conductor The cord set must have a rated current capacity of at least 10 A...
  • Page 12 OMPLIANCES AND AFETY TATEMENTS La prise secteur doit se trouver à proximité de l’appareil et son accès doit ◆ être facile. Vous ne pouvez mettre l’appareil hors circuit qu’en débranchant son cordon électrique au niveau de cette prise. L’appareil fonctionne à une tension extrêmement basse de sécurité qui est ◆...
  • Page 13 OMPLIANCES AND AFETY TATEMENTS Bitte unbedingt vor dem Einbauen des Switches die folgenden Sicherheitsanweisungen durchlesen: Die Installation und der Ausbau des Geräts darf nur durch WARNUNG: Fachpersonal erfolgen. Das Gerät sollte nicht an eine ungeerdete Wechselstromsteckdose ◆ angeschlossen werden. Das Gerät muß an eine geerdete Steckdose angeschlossen werden, welche ◆...
  • Page 14 OMPLIANCES AND AFETY TATEMENTS ARNINGS AND AUTIONARY ESSAGES This product does not contain any serviceable user parts. ARNING Installation and removal of the unit must be carried out by ARNING qualified personnel only. When connecting this device to a power outlet, connect the ARNING field ground lead on the tri-pole power plug to a valid earth ground line to prevent electrical hazards.
  • Page 15 OMPLIANCES AND AFETY TATEMENTS Continual monitoring of safety standards. ◆ ND OF RODUCT This product is manufactured in such a way as to allow for the recovery and disposal of all included electrical components once the product has reached the end of its life. ANUFACTURING ATERIALS There are no hazardous nor ozone-depleting materials in this product.
  • Page 16 OMPLIANCES AND AFETY TATEMENTS – 14 –...

  • Page 17: About This Guide

    BOUT UIDE URPOSE This guide details the hardware features of the switch, including the physical and performance-related characteristics, and how to install the switch. UDIENCE The guide is intended for use by network administrators who are responsible for installing and setting up network equipment; consequently, it assumes a basic working knowledge of LANs (Local Area Networks).
  • Page 18 BOUT UIDE EVISION ISTORY This section summarizes the changes in each revision of this guide. 2009 R ECEMBER EVISION This is the first revision of this guide. – 16 –...

  • Page 19: Table Of Contents

    ONTENTS OMPLIANCES AND AFETY TATEMENTS BOUT UIDE ONTENTS ABLES IGURES NTRODUCTION Overview Description of Hardware ETWORK LANNING Introduction to Switching Application Examples Application Notes NSTALLING THE WITCH Selecting a Site Ethernet Cabling Equipment Checklist Mounting Installing an Optional SFP Transceiver Connecting to a Power Source Connecting to the Console Port AKING...
  • Page 20 ONTENTS Fiber Optic SFP Devices Connectivity Rules Cable Labeling and Connection Records ROUBLESHOOTING Diagnosing Switch Indicators Power and Cooling Problems Installation In-Band Access ABLES Twisted-Pair Cable and Pin Assignments Fiber Standards PECIFICATIONS Physical Characteristics Switch Features Management Features Standards Compliances LOSSARY NDEX –...

  • Page 21: Tables

    ABLES Table 1: Supported SFP Transceivers Table 2: Port Status LEDs Table 3: System Status LEDs Table 4: Serial Cable Wiring Table 5: Maximum 1000BASE-T Gigabit Ethernet Cable Length Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths Table 7: Maximum 1000BASE-LX Gigabit Ethernet Cable Length Table 8: Maximum 1000BASE-LH Gigabit Ethernet Cable Length Table 9:...
  • Page 22 ABLES – 20 –...

  • Page 23: Figures

    IGURES Figure 1: Front and Rear Panels Figure 2: Port LEDs Figure 3: Power Supply Socket Figure 4: Collapsed Backbone Figure 5: Network Aggregation Plan Figure 6: Remote Connections with Fiber Cable Figure 7: Making VLAN Connections Figure 8: RJ-45 Connections Figure 9: Attaching the Brackets Figure 10:...
  • Page 24 IGURES – 22 –...

  • Page 25: Introduction

    NTRODUCTION VERVIEW The SMC8028L2 is a Gigabit Ethernet Layer 2 switch with 28 1000BASE-T ports, four of which operate in combination with four Small Form Factor Pluggable (SFP) transceiver slots (see Figure 1-1, Ports 25-28). The switch also includes an SNMP-based management agent, which provides both in-band and out-of- band access for managing the switch.

  • Page 26: Description Of Hardware

    | Introduction HAPTER Description of Hardware WITCH RCHITECTURE The switch employs a wire-speed, non-blocking switching fabric. This permits simultaneous wire-speed transport of multiple packets at low latency on all ports. The switch also features full-duplex capability on all ports, which effectively doubles the bandwidth of each connection.

  • Page 27: Table 1: Supported Sfp Transceivers

    The following table shows a list of transceiver types which have been tested with the switch. For an updated list of vendors supplying these transceivers, contact your local SMC dealer. For information on the recommended standards for fiber optic cabling, see "1000 Mbps Gigabit Ethernet Collision Domain" on page 60.

  • Page 28: Table 2: Port Status Leds

    | Introduction HAPTER Description of Hardware ORT AND YSTEM TATUS The switch includes a display panel for key system and port indications that simplify installation and network troubleshooting. The LEDs, which are located on the front panel for easy viewing, are shown below and described in the following tables.

  • Page 29: Figure 3: Power Supply Socket

    | Introduction HAPTER Description of Hardware Table 3: System Status LEDs (Continued) Condition Status Diang On Green The system diagnostic test has completed successfully. On Yellow The system diagnostic test is in progress. Flashing Yellow The system diagnostic test has detected a fault. Flashing Green and The system is booting up.
  • Page 30 | Introduction HAPTER Description of Hardware – 28 –...

  • Page 31: Network Planning

    ETWORK LANNING NTRODUCTION TO WITCHING A network switch allows simultaneous transmission of multiple packets via non- crossbar 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.

  • Page 32: Application Examples

    | Network Planning HAPTER Application Examples PPLICATION XAMPLES The switch is not only designed to segment your network, but also to provide a wide range of options in setting up network connections. Some typical applications are described below. OLLAPSED ACKBONE The switch is an excellent choice for mixed Ethernet, Fast Ethernet, and Gigabit Ethernet installations where significant growth is expected in the near future.

  • Page 33: Figure 5: Network Aggregation Plan

    | Network Planning HAPTER Application Examples ETWORK GGREGATION With 28 parallel bridging ports (i.e., 28 distinct collision domains), the switch can collapse a complex network down into a single efficient bridged node, increasing overall bandwidth and throughput. In the figure below, the 1000BASE-T ports on the switch are providing 100 Mbps connectivity for up to 28 segments.

  • Page 34: Figure 6: Remote Connections With Fiber Cable

    | Network Planning HAPTER Application Examples EMOTE ONNECTIONS WITH IBER ABLE Fiber optic technology allows for longer cabling than any other media type. A 1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a 1000BASE-LX (SMF) link up to 5 km, and a 1000BASE-LH link up to 70 km. This allows the switch to serve as a collapsed backbone, providing direct connectivity for a widespread LAN.

  • Page 35: Figure 7: Making Vlan Connections

    | Network Planning HAPTER Application Examples VLAN C AKING ONNECTIONS This switch supports VLANs which can be used to organize any group of network nodes into separate broadcast domains. VLANs confine broadcast traffic to the originating group, and can eliminate broadcast storms in large networks. This provides a more secure and cleaner network environment.

  • Page 36: Application Notes

    | Network Planning HAPTER Application Notes PPLICATION OTES Full-duplex operation only applies to point-to-point access (such as when a switch is attached to a workstation, server or another switch). When the switch is connected to a hub, both devices must operate in half-duplex mode.

  • Page 37: Installing The Switch

    NSTALLING THE WITCH ELECTING A 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 ■...

  • Page 38: Ethernet Cabling

    | Installing the Switch HAPTER Ethernet Cabling THERNET ABLING 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) ◆...

  • Page 39: Equipment Checklist

    | Installing the Switch HAPTER Equipment Checklist QUIPMENT HECKLIST 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. ACKAGE ONTENTS Gigabit Ethernet Switch (SMC8028L2) ◆...

  • Page 40: Mounting

    | Installing the Switch HAPTER Mounting OUNTING 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. OUNTING Before rack mounting the switch, pay particular attention to the following factors: Temperature: Since the temperature within a rack assembly may be higher ◆...

  • Page 41: Figure 9: Attaching The Brackets

    | Installing the Switch HAPTER Mounting Figure 9: Attaching the Brackets 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 –...

  • Page 42: Figure 11: Attaching The Adhesive Feet

    | Installing the Switch HAPTER Mounting If installing a single switch only, turn to "Connecting to a Power Source" at the end of this chapter. If installing multiple switches, mount them in the rack, one below the other, in any order. ESKTOP OR HELF OUNTING...

  • Page 43: Installing An Optional Sfp Transceiver

    | Installing the Switch HAPTER Installing an Optional SFP Transceiver SFP T NSTALLING AN PTIONAL RANSCEIVER Figure 12: Inserting an SFP Transceiver into a Slot The SFP slots support the following optional SFP transceivers: 1000BASE-SX ◆ 1000BASE-LX ◆ 1000BASE-LH ◆ To install an SFP transceiver, do the following: Consider network and cabling requirements to select an appropriate SFP transceiver type.

  • Page 44: Connecting To A Power Source

    | Installing the Switch HAPTER Connecting to a Power Source SFP transceivers are hot-swappable. The switch does not need to be powered off before installing or removing a transceiver. However, always first disconnect the network cable before removing a transceiver. SFP transceivers are not provided in the switch package.

  • Page 45: Connecting To The Console Port

    | Installing the Switch HAPTER Connecting to the Console Port ONNECTING TO THE ONSOLE The DB-9 serial port on the switch’s back panel is used to connect to the switch for out-of-band console configuration. The command-line-driven configuration program can be accessed from a terminal or a PC running a terminal emulation program.
  • Page 46 | Installing the Switch HAPTER Connecting to the Console Port Data bits—8 ◆ Flow control—none ◆ – 50 –...

  • Page 47: Making Network Connections

    AKING ETWORK ONNECTIONS ONNECTING ETWORK EVICES The switch is designed to be connected to 10 or 100 Mbps network cards in PCs and servers, as well as to other switches and hubs. It may also be connected to remote devices using optional 1000BASE-SX, 1000BASE-LX, or 1000BASE-LH SFP transceivers.

  • Page 48: Figure 15: Making Twisted-Pair Connections

    | Making Network Connections HAPTER Twisted-Pair Devices ONNECTING TO ERVERS UBS AND WITCHES Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector. Figure 15: Making Twisted-Pair Connections If the device is a network card and the switch is in the wiring closet, attach the other end of the cable segment to a modular wall outlet that is connected to the wiring closet.

  • Page 49: Figure 16: Network Wiring Connections

    | Making Network Connections HAPTER Twisted-Pair Devices ETWORK IRING ONNECTIONS Today, the punch-down block is an integral part of many of the newer equipment racks. It is actually part of the patch panel. Instructions for making connections in the wiring closet with this type of equipment follows. Attach one end of a patch cable to an available port on the switch, and the other end to the patch panel.

  • Page 50: Fiber Optic Sfp Devices

    | Making Network Connections HAPTER Fiber Optic SFP Devices SFP D IBER PTIC EVICES An optional Gigabit SFP transceiver (1000BASE-SX, 1000BASE-LX or 1000BASE- LH) can be used for a backbone connection between switches, or for connecting to a high-speed server. Each single-mode fiber port requires 9/125 micron single-mode fiber optic cable with an LC connector at both ends.

  • Page 51: Figure 17: Making Fiber Port Connections

    | Making Network Connections HAPTER Fiber Optic SFP Devices Figure 17: Making Fiber Port Connections As a connection is made, check the Link LED on the switch corresponding to the port to be sure that the connection is valid. The 1000BASE-SX, 1000BASE-LX, 1000BASE-LH fiber optic ports operate at 1 Gbps, full duplex, with auto-negotiation of flow control.

  • Page 52: Connectivity Rules

    | Making Network Connections HAPTER Connectivity Rules ONNECTIVITY ULES When adding hubs (repeaters) to your network, please follow the connectivity rules listed in the manuals for these products. However, note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices.

  • Page 53: Table 7: Maximum 1000Base-Lx Gigabit Ethernet Cable Length

    | Making Network Connections HAPTER Connectivity Rules Table 7: Maximum 1000BASE-LX Gigabit Ethernet Cable Length Fiber Size Fiber Bandwidth Maximum Cable Length Connector 9/125 micron single- 2 m - 5 km (7 ft - 3.2 miles) mode fiber Table 8: Maximum 1000BASE-LH Gigabit Ethernet Cable Length Fiber Size Fiber Bandwidth Maximum Cable Length...

  • Page 54: Cable Labeling And Connection Records

    | Making Network Connections HAPTER Cable Labeling and Connection Records ABLE ABELING AND ONNECTION ECORDS When planning a network installation, it is essential to label the opposing ends of cables and to record where each cable is connected. Doing so will enable you to easily locate inter-connected devices, isolate faults and change your topology without need for unnecessary time consumption.

  • Page 55: Diagnosing Switch Indicators

    ROUBLESHOOTING IAGNOSING WITCH NDICATORS Table 11: Troubleshooting Chart Symptom Action PWR LED is Off ◆ Check connections between the switch, the power cord and the wall outlet. ◆ Contact your dealer for assistance. DIAG LED Flashing ◆ Power cycle the switch to try and clear the condition. Yellow ◆...

  • Page 56: Troubleshooting

    | Troubleshooting PPENDIX Power and Cooling Problems OWER AND OOLING ROBLEMS If the power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply.

  • Page 57: Cables

    ABLES WISTED ABLE AND SSIGNMENTS For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of wires. For 1000BASE-T connections the twisted-pair cable must have four pairs of wires. Each wire pair is identified by two different colors. For example, one wire might be green and the other, green with white stripes.

  • Page 58: Table 12: 10/100Base-Tx Mdi And Mdi-X Port Pinouts

    | Cables PPENDIX Twisted-Pair Cable and Pin Assignments 10BASE-T/100BASE-TX P SSIGNMENTS Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or 100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).

  • Page 59: Figure 19: Straight-Through Wiring

    | Cables PPENDIX Twisted-Pair Cable and Pin Assignments Figure 19: Straight-through Wiring EIA/TIA 568B RJ-45 Wiring Standard 10/100BASE-TX Straight-through Cable White/Orange Stripe Orange White/Green Stripe End A End B Blue White/Blue Stripe Green White/Brown Stripe Brown ROSSOVER IRING If the twisted-pair cable is to join two ports and either both ports are labeled with an “X”...

  • Page 60: Table 13: 1000Base-T Mdi And Mdi-X Port Pinouts

    | Cables PPENDIX Twisted-Pair Cable and Pin Assignments 1000BASE-T P SSIGNMENTS All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use straight-through cables for all network connections to PCs or servers, or to other switches or hubs. The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports require that all four pairs of wires be connected.

  • Page 61: Fiber Standards

    | Cables PPENDIX Fiber Standards 1000BASE-T DJUSTING XISTING ATEGORY ABLING TO 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: Replace any Category 5 patch cables with high-performance Category 5e or Category 6 cables.

  • Page 62: Table 14: Fiber Standards

    | Cables PPENDIX Fiber Standards Table 14: Fiber Standards (Continued) ITU-T Description Application Standard G.654 1550-nm Loss-Minimized Fiber Extended long-haul applications. Optimized for high-power Single-mode, 9/125-micron core transmission in the 1500 to 1600-nm region, with low loss in the 1550-nm band.

  • Page 63: Specifications

    PECIFICATIONS HYSICAL HARACTERISTICS ORTS 24 10/100/1000BASE-T, with auto-negotiation 4 10/100/1000BASE-T shared with two SFP transceiver slots ETWORK NTERFACE Ports 1-28: RJ-45 connector, auto MDI/X 10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better) 100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better) 1000BASE-T: RJ-45 (100-ohm, UTP or STP cable;...
  • Page 64 | Specifications PPENDIX Physical Characteristics EIGHT 1.80 kg (3.96 lbs) 44.0 x 17.2 x 4.4 cm (17.32 x 6.77 x 1.73 in.) EMPERATURE Operating: 0°C to 45°C (32°F to 113°F) Storage: -40°C to 70°C (-40°F to 158°F) UMIDITY Operating: 10% to 90% (non-condensing) AC I NPUT 100 to 240 V, 50-60 Hz, 2A...

  • Page 65: Switch Features

    | Specifications PPENDIX Switch Features WITCH EATURES ORWARDING Store-and-forward HROUGHPUT Wire speed ONTROL Full Duplex: IEEE 802.3x Half Duplex: Back pressure ANAGEMENT EATURES ANAGEMENT SSH, Telnet, SNMP, or HTTP ANAGEMENT RS-232 DB-9 console port OFTWARE OADING TFTP in-band, or XModem out-of-band –...

  • Page 66: Standards

    | Specifications PPENDIX Standards TANDARDS IEEE 802.3-2005 Ethernet, Fast Ethernet, Gigabit Ethernet Full-duplex flow control Link Aggregation Control Protocol IEEE 802.1D -2004 Spanning Tree Protocol Rapid Spanning Tree Protocol Multiple Spanning Tree Protocol ISO/IEC 8802-3 OMPLIANCES MISSIONS EN55022 (CISPR 22) Class A EN 61000-3-2/3 FCC Class A CE Mark...

  • Page 67: Glossary

    LOSSARY 10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5 UTP cable. 100BASE-TX IEEE 802.3u specification for 100 Mbps Ethernet over two pairs of Category 5 UTP cable. 1000BASE-LH Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron core fiber cable.
  • Page 68 LOSSARY ANDWIDTH The difference between the highest and lowest frequencies available for network signals. Also synonymous with wire speed, the actual speed of the data transmission along the cable. OLLISION OMAIN Single CSMA/CD LAN segment. CSMA/CD CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication method employed by Ethernet, Fast Ethernet, and Gigabit Ethernet.
  • Page 69 LOSSARY IEEE Institute of Electrical and Electronic Engineers. IEEE 802.3 Defines carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications. IEEE 802.3 Defines CSMA/CD access method and physical layer specifications for 1000BASE-T Gigabit Ethernet. (Now incorporated in IEEE 802.3-2002.) IEEE 802.3 Defines CSMA/CD access method and physical layer specifications for 100BASE- TX Fast Ethernet.
  • Page 70 LOSSARY (MAC) EDIA CCESS ONTROL A portion of the networking protocol that governs access to the transmission medium, facilitating the exchange of data between network nodes. An acronym for Management Information Base. It is a set of database objects that contains information about the device. ODAL ANDWIDTH Bandwidth for multimode fiber is referred to as modal bandwidth because it...
  • Page 71 LOSSARY UDP packets are delivered just like IP packets – connection-less datagrams that may be discarded before reaching their targets. UDP is useful when TCP would be too complex, too slow, or just unnecessary. Unshielded twisted-pair cable. LAN (VLAN) IRTUAL A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network.
  • Page 72 LOSSARY – 84 –...

  • Page 73: Index

    NDEX UMERICS 10 Mbps connectivity rules desktop mounting 100 Mbps connectivity rules device connections 1000 Mbps connectivity rules 1000BASE-LH fiber cable Lengths 1000BASE-LX fiber cable Lengths 1000BASE-SX fiber cable Lengths electrical interference, avoiding 1000BASE-T equipment checklist pin assignments Ethernet connectivity rules ports 100BASE-TX, cable lengths 10BASE-T, cable lengths...
  • Page 74 NDEX site selelction SNMP agent management specifications agent compliances features environmental out-of-band power SNMP standards web-based compliance mounting the switch IEEE in a rack status LEDs on a desktop or shelf surge suppressor, using multimode fiber optic cables switch architecture switching method network connections...
  • Page 76 SMC8028L2 150200062800A R02 150200000155A R01 20 Mason • Irvine, CA 92618 • Phn: 949-679-8000 • www.smc.com...

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