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C

HAPTER

 2

  |  Installing the Switch

Installing an Optional SFP Transceiver

–  36  –

Figure 9:  Installing the Switch in a Rack

3.

If installing a single switch only, go to 

"" on page 37

. 

4.

If installing multiple switches, mount them in the rack, one below the other.

I

NSTALLING

 

AN

 O

PTIONAL

 SFP T

RANSCEIVER

Figure 10:  Installing an Optional SFP Transceiver

Summary of Contents for ECS4810-12M

Page 1: ...Installation Guide www edge core com 12 Port Gigabit Ethernet Switch ECS4810 12M ...

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Page 3: ...NSTALLATION GUIDE ECS4810 12M MANAGED 12 PORT GIGABIT ETHERNET SWITCH Layer 2 Switch with 12 Combination Gigabit RJ 45 SFP Ports and 1 1000BASE T Management Port ECS4810 12M E082011 DT R01 xxxxxxxxxxxxx ...

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Page 5: ...interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense You are cautioned that changes or modifications not expressly approved by the party responsible for compliance could void your authority to operate the equipment You may use unshielded t...

Page 6: ...monic current emission according to EN 61000 3 2 2006 Class A Limitation of voltage fluctuation and flicker in low voltage supply system according to EN 61000 3 3 2005 Immunity Product family standard according to EN 55024 2001 A2 2003 Electrostatic Discharge according to IEC 61000 4 2 2008 Radio frequency electromagnetic field according to IEC 61000 4 3 2007 Electrical fast transient burst accord...

Page 7: ...transmit laser while it is powered on Also never look directly at the fiber TX port and fiber cable ends when they are powered on Ne regardez jamais le laser tant qu il est sous tension Ne regardez jamais directement le port TX Transmission à fibres optiques et les embouts de câbles à fibres optiques tant qu ils sont sous tension Niemals ein Übertragungslaser betrachten während dieses eingeschalte...

Page 8: ...he socket outlet must be near to the unit and easily accessible You can only remove power from the unit by disconnecting the power cord from the outlet This unit operates under SELV Safety Extra Low Voltage conditions according to IEC 60950 The conditions are only maintained if the equipment to which it is connected also operates under SELV conditions France and Peru only This unit cannot be power...

Page 9: ...0 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 The attachment plug must be an earth grounding type with NEMA 5 15P 15 A 125 V or NEMA 6 15P 15 A 250 V configuration Denmark ...

Page 10: ...on portant l appellation Neutre et avec raccordement direct à la terre masse Cordon électrique Il doit être agréé dans le pays d utilisation Etats Unis et Canada Le cordon doit avoir reçu l homologation des UL et un certificat de la CSA Les spécifications minimales pour un cable flexible sont AWG No 18 ouAWG No 16 pour un cable de longueur inférieure à 2 mètres type SV ou SJ 3 conducteurs Le cordo...

Page 11: ...räteeingang haben Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein Die Stromversorgung des Geräts kann nur durch Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen werden Der Betrieb dieses Geräts erfolgt unter den SELV Bedingungen Sicherheitskleinstspannung gemäß IEC 60950 Diese Bedingungen sind nur gegeben wenn auch die an das Gerät angeschlossenen Geräte...

Page 12: ...serviceable user parts WARNING Installation and removal of the unit must be carried out by qualified personnel only WARNING When connecting this device to a power outlet connect the field ground lead on the tri pole power plug to a valid earth ground line to prevent electrical hazards WARNING This switch uses lasers to transmit signals over fiber optic cable The lasers are compliant with the requi...

Page 13: ...ncluded electrical components once the product has reached the end of its life MANUFACTURING MATERIALS There are no hazardous nor ozone depleting materials in this product DOCUMENTATION All printed documentation for this product uses biodegradable paper that originates from sustained and managed forests The inks used in the printing process are non toxic ...

Page 14: ...COMPLIANCES AND SAFETY STATEMENTS 14 ...

Page 15: ...onventions are used throughout this guide to show information RELATED PUBLICATIONS The following publication gives specific information on how to operate and use the management functions of the switch The Management Guide Also as part of the switch s software there is an online web based help that describes all management related features NOTE Emphasizes important information or calls your attenti...

Page 16: ...ABOUT THIS GUIDE 16 REVISION HISTORY This section summarizes the changes in each revision of this guide AUGUST 2011 REVISION This is the first revision of this guide ...

Page 17: ...TALLING THE SWITCH 31 Selecting a Site 31 Ethernet Cabling 32 Equipment Checklist 33 Mounting 34 Installing an Optional SFP Transceiver 36 Grounding the Chasis 37 Connecting to a Power Source 38 Connecting to the Console Port 41 Connecting to the Alarm Port 42 3 MAKING NETWORK CONNECTIONS 45 Connecting Network Devices 45 Twisted Pair Devices 45 Fiber Optic SFP Devices 46 Connectivity Rules 48 ...

Page 18: ...sing Switch Indicators 53 Power and Cooling Problems 54 Installation 54 In Band Access 55 B CABLES 57 Twisted Pair Cable and Pin Assignments 57 C SPECIFICATIONS 63 Physical Characteristics 63 Switch Features 65 Management Features 65 Standards 66 Compliances 66 GLOSSARY 67 INDEX 73 ...

Page 19: ... 48 Table 8 Maximum 1000BASE LHX Gigabit Ethernet Cable Length 48 Table 9 Maximum 1000BASE ZX Gigabit Ethernet Cable Length 49 Table 10 Maximum 1000BASE T Gigabit Ethernet Cable Length 49 Table 11 Maximum Fast Ethernet Cable Lengths 49 Table 12 Maximum 100BASE FX Cable Length 49 Table 13 Maximum Ethernet Cable Length 49 Table 14 Troubleshooting Chart 53 Table 15 10 100BASE TX MDI and MDI X Port Pi...

Page 20: ...TABLES 20 ...

Page 21: ...Brackets 35 Figure 9 Installing the Switch in a Rack 36 Figure 10 Installing an Optional SFP Transceiver 36 Figure 11 DC Plug Connections 39 Figure 12 AC Power Rececptacle 40 Figure 13 Console Cable 41 Figure 14 Alarm Port D 15 Pin Out 42 Figure 15 External Alarm I O Connections 43 Figure 16 Making Connections to SFP Transceivers 47 Figure 17 RJ 45 Connector Pin Numbers 57 Figure 18 Straight throu...

Page 22: ...FIGURES 22 ...

Page 23: ...her in the CO or anywhere along the path between the CO and subscribers Figure 1 Deployment The switch has a 1000BASE T port for dedicated management access which can be operated outside the data channel It has an SNMP based management agent embedded on the main board which supports both in band and out of band access using a Web browser SNMP RMON or Telnet Metropolitan Area Network Access Aggrega...

Page 24: ...s 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 Port Status Indicators System Status Indicators RJ 45 Management Port and Console Port Combination RJ45 SFP Ports Alarm Port DC Input AC Input Power Switch Ventilation ...

Page 25: ...r monitor the switch using its embedded management software or through SNMP applications To manage the switch you can make a direct connection to the console port out of band or you can manage the switch through a network connection in band using Telnet the on board web agent or SNMP based network management software The switch management port RJ 45 provides a dedicated management channel that ope...

Page 26: ...nsceivers 100BASE FX For information on the recommended standards for fiber optic cabling see Fiber Optic SFP Devices on page 46 10 100 1000BASE T PORTS The switch contains contains 12 1000BASE T RJ 45 ports that operate at 10 Mbps or 100 Mbps half or full duplex or at 1000 Mbps full duplex Because all of the RJ 45 ports support automatic MDI MDI X operation you can use straight through cables for...

Page 27: ...e However note that the interface connection parameters of this port cannot be configured CONSOLE PORT The console port on the switch s front panel is an RJ 45 connector that enables a connection to a terminal for performing switch monitoring and configuration functions The terminal may be a PC or workstation running terminal emulation software or a terminal configured as a Data Terminal Equipment...

Page 28: ...tus ALM MJR Red Indicates presence within the system of one or more major traffic affecting system alarm s that are not masked by the alarm filter ALM MIN Amber Indicates presence within the system of one or more minor traffic affecting system alarm s that are not masked by the alarm filter DIAG Amber System self diagnostic is in progress Amber continuous System self diagnostic has failed Green Sy...

Page 29: ...0 Mbps network connection Flashing indicates activity On Flashing Amber Port has established a valid 10 100 Mbps network connection Flashing indicates activity Off There is no valid link on the port Table 3 SFP Present Status LEDs 1 12 LED Condition Status 1 12 On Green The switch has detected an SFP with a valid link in this port the corresponding RJ 45 port will be disabled Off There is no SFP p...

Page 30: ...30 POWER SUPPLY SOCKETS There are two power sockets on the front panel of the switch The standard power socket is for the AC power cord There is also a DC power supply socket Figure 5 Power Supply Socket AC Power Socket DC Power Socket Power Switch ...

Page 31: ...pace 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 gr...

Page 32: ...rk 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 wi...

Page 33: ...tch ECS4810 12M Four adhesive foot pads Power Cord Bracket Mounting Kit containing two brackets and eight screws for attaching the brackets to the switch Console cable RJ 45 to DB 9 This Installation Guide Management Guide CD OPTIONAL RACK MOUNTING EQUIPMENT If you plan to rack mount the switches be sure to have the following equipmentavailable Four mounting screws for each device you plan to inst...

Page 34: ...to the bottom of the first switch Figure 7 Attaching the Adhesive Feet 2 Set the device on a flat surface near an AC power source making sure there are at least two inches of space on all sides for proper air flow 3 If installing a single switch only go to on page 37 4 If installing multiple switches attach four adhesive feet to each one Place each device squarely on top of the one below in any or...

Page 35: ...hanical 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 screw...

Page 36: ...iver 36 Figure 9 Installing the Switch in a Rack 3 If installing a single switch only go to on page 37 4 If installing multiple switches mount them in the rack one below the other INSTALLING AN OPTIONAL SFP TRANSCEIVER Figure 10 Installing an Optional SFP Transceiver ...

Page 37: ... powering on the switch ground the switch to earth as described below 1 Ensure the rack on which the switch is to be mounted is properly grounded and in compliance with ETSI ETS 300 253 2 Ensure that there is a good electrical connection to the grounding point on the rack no paint or isolating surface treatment 3 Disconnect all power cables to the switch 4 Then attach the grounding wire to the gro...

Page 38: ...nes is turned off at the supply circuit breaker or disconnected from the power bus NOTE To provide adequate circuit protection between the DC power supply and the switch all intermediate wiring and circuitry should be rated to carry a load at least two times the maximum rating for this switch described in Power Supply on page 64 NOTE The wiring between the DC power supply and the switch must be st...

Page 39: ... screwdriver to loosen the screws on the power plug and open the wire clamps Figure 11 DC Plug Connections 6 Insert the wire leads into the openings shown in the figure below Each lead inserted in the power plug must match the lead attached to the power source Use the label above the DC power connection block to identify the appropriate power input and return or ground lines 7 Push each wire about...

Page 40: ...t the external AC power supply can provide 100 to 240 VAC 50 60 Hz 0 65 A minimum 2 Plug the power cable into a grounded 3 pin AC power source 3 Insert the plug on the other end of the power cable directly into the receptacle on the switch 4 After the power source is tuned on set the power switch on the front of the switch to the ON position marked Figure 12 AC Power Rececptacle NOTE For internati...

Page 41: ... a PC or workstation running a VT 100 terminal emulator or a VT 100 terminal A crossover RJ 45 to DB 9 cable is supplied with the unit for connecting to the console port as illustrated below The pin assignments used to connect to the serial port are described below Figure 13 Console Cable WIRING MAP FOR SERIAL CABLE Table 4 Serial Cable Wiring Switch s 8 Pin Serial Port Null Modem PC s 9 Pin DTE P...

Page 42: ...0 bps Character Size 8 Characters Parity None Stop bit One Data bits 8 Flow control none CONNECTING TO THE ALARM PORT The DB 15 alarm port on the switch s front panel is used to provide external customer site alarm inputs The pin assignments used to connect to the alarm port are provided in the following table Figure 14 Alarm Port D 15 Pin Out 1 15 ...

Page 43: ...lay dry contact closure from pin 3 9 ALARM_IN1_EXT_P External alarm input 1 external relay dry contact closure to pin14 10 ALARM_IN2_EXT_P External alarm input 2 external relay dry contact closure to pin 15 13 ALARM_IN3_EXT_RTN External alarm input 3 external relay dry contact closure from pin 3 14 ALARM_IN1_EXT_RTN External alarm input 1 external relay dry contact closure from pin 9 15 ALARM_IN2_...

Page 44: ...CHAPTER 2 Installing the Switch Connecting to the Alarm Port 44 ...

Page 45: ... connections CABLING GUIDELINES The RJ 45 ports on the switch support automatic MDI MDI X pinout configuration so you can use standard straight through twisted pair cables to connect to any other network device PCs servers switches routers or hubs See Cables on page 57 for further information on cabling CONNECTING TO PCS SERVERS HUBS AND SWITCHES 1 Attach one end of a twisted pair cable segment to...

Page 46: ... optic cabling with an LC connector at both ends 1 Remove and keep the LC port s rubber cover When not connected to a fiber cable the rubber cover should be replaced to protect the optics NOTE 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...

Page 47: ...are keyed the cable can be attached in only one orientation Figure 16 Making Connections to SFP Transceivers 4 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 LX5 1000BASE LX15 1000BASE LHX and 1000BASE ZX fiber optic ports operate at 1 Gbps full duplex The maximum length for fiber optic cable operating at Giga...

Page 48: ...anced Category 5 or Category 6 cable should be used The Category 5e and 6 specifications include test parameters that are only recommendations for Category 5 Therefore the first step in preparing existing Category 5 cabling for running 1000BASE T is a simple test of the cable installation to be sure that it complies with the IEEE 802 3 2005 standards 1000 MBPS GIGABIT ETHERNET COLLISION DOMAIN Tab...

Page 49: ...able 10 Maximum 1000BASE T Gigabit Ethernet Cable Length Cable Type Maximum Cable Length Connector Category 5 5e or 6 100 ohm UTP or STP 100 m 328 ft RJ 45 Table 11 Maximum Fast Ethernet Cable Lengths Type Cable Type Max Cable Length Connector 100BASE TX Category 5 or better 100 ohm UTP or STP 100 m 328 ft RJ 45 Table 12 Maximum 100BASE FX Cable Length Type Fiber Type Max Cable Length Connector 10...

Page 50: ...BASE ZX 70 km 43 5 miles for single mode fiber duplex fiber 100BASE FX 20 km 12 4 miles for single mode fiber duplex fiber However power budget constraints must also be considered when calculating the maximum cable length for your specific environment CABLE LABELING AND CONNECTION RECORDS When planning a network installation it is essential to label the opposing ends of cables and to record where ...

Page 51: ... ports For ease of understanding use a location based key when assigning prefixes to your cable labeling Use sequential numbers for cables that originate from the same equipment Differentiate between racks by naming accordingly Label each separate piece of equipment Display a copy of your equipment map including keys to all abbreviations at each equipment rack ...

Page 52: ...CHAPTER 3 Making Network Connections Cable Labeling and Connection Records 52 ...

Page 53: ...sed and its length does not exceed specified limits Check the adapter on the attached device and cable connections for possible defects Replace the defective adapter or cable if necessary DIAG LED is Amber Power cycle the switch to try and clear the condition If the condition does not clear contact your local dealer for assistance MGMT LED is off Verify that the switch and attached device are powe...

Page 54: ... defective INSTALLATION Verify that all system components have been properly installed If one or more components appear to be malfunctioning such as the power cord or network cabling test them in an alternate environment where you are sure that all the other components are functioning properly ALM MJR LED is Red One or more major system alarm s affecting traffic have occurred Check the alarm filte...

Page 55: ...blishing a link to the management agent check to see if you have a valid network connection Then verify that you entered the correct IP address Also be sure the port through which you are connecting to the switch has not been disabled If it has not been disabled then check the network cabling that runs between your remote location and the switch CAUTION The management agent can accept up to four s...

Page 56: ...APPENDIX A Troubleshooting In Band Access 56 ...

Page 57: ...hite stripes Also an RJ 45 connector must be attached to both ends of the cable The figure below illustrates how the pins on the RJ 45 connector are numbered Be sure to hold the connectors in the same orientation when attaching the wires to the pins Figure 17 RJ 45 Connector Pin Numbers CAUTION DO NOT plug a phone jack connector into any RJ 45 port Use only twisted pair cables with RJ 45 connector...

Page 58: ...er end of the cable When using any RJ 45 port on this switch you can use either straight through or crossover cable Note The and signs represent the polarity of the wires that make up each wire pair STRAIGHT THROUGH WIRING If the twisted pair cable is to join two ports and only one of the ports has an internal crossover MDI X the two pairs of wires must be straight through When auto negotiation is...

Page 59: ...or crossover cable to connect to any device type You must connect all four wire pairs as shown in the following diagram to support Gigabit Ethernet Figure 19 Crossover Wiring White Orange Stripe Orange White Green Stripe Green 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 EIA TIA 568B RJ 45 Wiring Standard 10 100BASE TX Straight through Cable End A End B Blue White Blue Stripe Brown White Brown Stripe White Ora...

Page 60: ...ng information is specified in the ANSI TIA EIA TSB 67 standard 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 c...

Page 61: ...summarized in the following table Table 17 1000BASE T MDI and MDI X Port Pinouts ITU T Standard Description Application G 651 Multimode Fiber 50 125 micron core Short reach connections in the 1300 nm or 850 nm band G 652 Non Dispersion Shifted FiberSingle mode 9 125 micron core Longer spans and extended reach Optimized for operation in the 1310 nm band but can also be used in the 1550 nm band G 65...

Page 62: ...er transmission in the 1500 to 1600 nm region with low loss in the 1550 nm band G 655 Non Zero Dispersion Shifted FiberSingle mode 9 125 micron core Extended long haul applications Optimized for high power dense wavelength division multiplexing DWDM operation in the region from 1500 to 1600 nm Table 17 1000BASE T MDI and MDI X Port Pinouts ITU T Standard Description Application ...

Page 63: ...E 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 Category 5 5e or 6 Maximum Cable Length 100 m 328 ft BUFFER ARCHITECTURE 8 Mbit packet buffer AGGREGATE BANDWIDTH 24 Gbps SWITCHING DATABASE 16K MAC address entries 1K static MAC addresses LEDS System PWR DIAG MGMT ALM MJR ALM MIN Port status link speed...

Page 64: ...torage 40 C to 70 C 40 F to 158 F HUMIDITY Operating 10 to 90 non condensing AC INPUT 100 240V 50 60Hz 0 65A DC INPUT 42 to 56V 0 6A POWER SUPPLY Internal auto ranging transformer 100 to 240 VAC 50 to 60 Hz POWER CONSUMPTION 39 Watts maximum Note Power consumption will vary depending on whether you use SFP modules or RJ 45 connections SFP modules use more power MAXIMUM CURRENT 0 65 A 100 VAC ...

Page 65: ...DE Store and forward THROUGHPUT Wire speed FLOW CONTROL Full Duplex IEEE 802 3x Half Duplex Back pressure MANAGEMENT FEATURES IN BAND MANAGEMENT Web Telnet SSH or SNMP manager OUT OF BAND MANAGEMENT RS 232 RJ 45 console port SOFTWARE LOADING TFTP in band or XModem out of band ...

Page 66: ... 1w Rapid Spanning Tree Protocol IEEE 802 1s Multiple Spanning Tree Protocol IEEE 802 1Q Virtual LAN ISO IEC 8802 3 CSMA CD COMPLIANCES EMISSIONS EN 55022 2007 Class A B EN 61000 3 2 2006 Class A EN 61000 3 3 2005 IMMUNITY EN 55024 2001 A2 2003 IEC 61000 4 2 3 4 5 6 8 11 SAFETY UL CUL UL UL 60950 1 2nd CSA CSA C22 2 60950 1 07 2nd CB IEC60950 1 ed 2 EN60950 1 2006 A11 2009 ...

Page 67: ...f Category 5 UTP cable 1000BASE LHX Long haul Gigabit Ethernet over two strands of 9 125 micron core fiber cable 1000BASE LX5 Long haul Gigabit Ethernet over two strands of 9 125 micron core fiber cable 1000BASE LX15 Long haul Gigabit Ethernet over two strands of 9 125 micron core fiber cable 1000BASE T IEEE 802 3ab specification for Gigabit Ethernet over 100 ohm Category 5 5e or 6 twisted pair ca...

Page 68: ...t Ethernet and Gigabit Ethernet END STATION A workstation server or other device that does not forward traffic ETHERNET A network communication system developed and standardized by DEC Intel and Xerox using baseband transmission CSMA CD access logical bus topology and coaxial cable The successor IEEE 802 3 standard provides for integration into the OSI model and extends the physical layer and medi...

Page 69: ...gabit Ethernet Now incorporated in IEEE 802 3 2005 IEEE 802 3U Defines CSMA CD access method and physical layer specifications for 100BASE TX Fast Ethernet Now incorporated in IEEE 802 3 2005 IEEE 802 3X Defines Ethernet frame start stop requests and timers used for flow control on full duplex links Now incorporated in IEEE 802 3 2005 IEEE 802 3Z Defines CSMA CD access method and physical layer sp...

Page 70: ...as modal bandwidth because it varies with the modal field or core diameter of the fiber Modal bandwidth is specified in units of MHz per km which indicates the amount of bandwidth supported by the fiber for a one km distance NETWORK DIAMETER Wire distance between two end stations in the same collision domain RJ 45 CONNECTOR A connector for twisted pair wiring SWITCHED PORTS Ports that are on separ...

Page 71: ...y be discarded before reaching their targets UDP is useful when TCP would be too complex too slow or just unnecessary UTP Unshielded twisted pair cable VIRTUAL LAN VLAN 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 A VLAN serves as a logical workgroup with no physical barriers allowing us...

Page 72: ...GLOSSARY 72 ...

Page 73: ...safety 66 connecting to the console port 41 connectivity rules 10 Gbps 48 10 Mbps 48 49 100 Mbps 49 1000 Mbps 48 contents of package 33 cooling problems 54 D desktop mounting 34 device connections 45 E electrical interference avoiding 31 equipment checklist 33 Ethernet connectivity rules 48 49 F Fast Ethernet connectivity rules 49 front panel of switch 24 G Gigabit Ethernet cable lengths 48 I indi...

Page 74: ...ctions 45 pinouts 60 61 rubber foot pads attaching 34 S serial cable wiring map 41 SFP transceiver slots 28 site selelction 31 specifications compliances 66 environmental 64 power 64 standards compliance 66 IEEE 66 status LEDs 28 surge suppressor using 31 switch architecture 24 T troubleshooting in band access 54 power and cooling problems 54 twisted pair connections 45 ...

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