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613-001492 Rev. A

x610 Series

Layer 3 Stackable
Gigabit Ethernet
Switches

x610-24Ts

x610-24Ts/X

x610-48Ts

x610-48Ts/X

x610-24Ts-POE+

x610-24Ts/X-POE+

x610-48Ts-POE+

x610-48Ts/X-POE+

Installation Guide

Содержание 48Ts/X

Страница 1: ...613 001492 Rev A x610 Series Layer 3 Stackable Gigabit Ethernet Switches x610 24Ts x610 24Ts X x610 48Ts x610 48Ts X x610 24Ts POE x610 24Ts X POE x610 48Ts POE x610 48Ts X POE Installation Guide...

Страница 2: ...their respective owners Allied Telesis Inc reserves the right to make changes in specifications and other information contained in this document without prior written notice The information provided...

Страница 3: ...mits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency...

Страница 4: ...ed Safety Statements Important The indicates that a translation of the safety statement is available in a PDF document Translated Safety Statements posted on the Allied Telesis website at www alliedte...

Страница 5: ...h 21 x610 24Ts X Switch 22 x610 48Ts Switch 23 x610 48Ts X Switch 24 x610 24Ts POE Switch 25 x610 24Ts X POE Switch 26 x610 48Ts POE Switch 27 x610 48Ts X POE Switch 28 10 100 1000Base T Ports 29 Conn...

Страница 6: ...Stacking Module 85 Chapter 4 Cabling the Network Ports 89 Twisted Pair and Fiber Optic Specifications 90 Twisted Pair Cable Specifications 90 SFP and SFP Transceiver Specifications 91 Installing SFP a...

Страница 7: ...x610 Series Layer 3 Gigabit Ethernet Switches Installation Guide 7 RJ 45 Twisted Pair Port Pinouts 116 RJ 45 Style Serial Terminal Port Pinouts 118 AT RPS3000 21 pin Connector Pinouts 118...

Страница 8: ...Contents 8...

Страница 9: ...1 Figure 26 AT StackXG Stacking Module 52 Figure 27 AT x6EM XS2 Stacking Module 52 Figure 28 100 125 VAC 125 V NEMA 5 20 Plug and Receptacle 53 Figure 29 Back to Back Topology x610 Switches 59 Figure...

Страница 10: ...AT PWR250 Power Supply Module 96 Figure 55 Stripped Wire 96 Figure 56 Inserting Wires into a DC Terminal Block 97 Figure 57 Power Cord Retaining Clip in the Up Position 99 Figure 58 Connecting the AC...

Страница 11: ...ATUS LED Descriptions 41 Table 10 STACK LED Descriptions 43 Table 11 SD LED Descriptions 45 Table 12 Class vs Power Levels 54 Table 13 PoE Ports Supported With AT PWR250 Power Supply Unit 55 Table 14...

Страница 12: ...Tables 12...

Страница 13: ...Layer 3 Gigabit Ethernet Switches This preface contains the following sections Product Documentation on page 14 Starting a Management Session on page 15 Safety Symbols Used in this Document on page 1...

Страница 14: ...the software features of the AlliedWare Plus Operating System Software which runs on the x610 Series Switches refer to AlliedWare Plus Operating System Software Reference Guide Virtual Chassis Stackin...

Страница 15: ...that describe how to start a local management session on a x610 switch refer to the Powering on a Switch with a DC AT PWR250 Power Supply Module on page 95 For information that describes how to log on...

Страница 16: ...s the safety symbols defined in Table 1 Table 1 Safety Symbols Symbol Meaning Description Caution Performing or omitting a specific action may result in equipment damage or loss of data Warning Perfor...

Страница 17: ...Where to Find Web based Guides The installation and user guides for all Allied Telesis products are available in portable document format PDF on our web site at www alliedtelesis com You can view the...

Страница 18: ...elesis com warranty for the specific terms and conditions of the warranty and for warranty registration Returning Products Products for return or repair must first be assigned a return materials autho...

Страница 19: ...Ds on page 43 Secure Digital SD LED on page 45 Terminal Port on page 46 Power Supplies on page 47 Redundant Power Supplies on page 49 AT LBM Loop Back Module on page 51 VCStack Stacking Module on page...

Страница 20: ...are eight Layer 3 switches in the series x610 24Ts Switch x610 24Ts X Switch x610 48Ts Switch x610 48Ts X Switch x610 24Ts POE Switch x610 24Ts X POE Switch x610 48Ts POE Switch x610 48Ts X POE Switc...

Страница 21: ...r either an AT StackXG or an AT x6EM XS2 stacking module Fixed 120 watts power supply Figure 1 shows the x610 24Ts switch front and rear panels Figure 1 x610 24Ts Switch 22 SFP 23 21 24 4 6 8 10 12 3...

Страница 22: ...ng module Fixed 120 watts power supply Figure 2 shows the x610 24Ts X switch front and rear panel Figure 2 x610 24Ts X Switch 22 SFP SFP 23 21 24 25 26 4 6 8 10 12 3 5 1 2 7 9 11 13 15 17 19 16 18 20...

Страница 23: ...Figure 3 shows the x610 48Ts switch front and rear panel Figure 3 x610 48Ts Switch 48R 38 40 42 44 46R 2 4 6 8 10 12 34 36 32 26 28 30 16 14 22 24 18 20 SFP 47 45 47R 37 39 41 43 45R 1 3 5 7 9 11 15 1...

Страница 24: ...e 4 shows the x610 48Ts X switch front and rear panel Figure 4 x610 48Ts X Switch POWER SUPPLY RPS READY RPS INPUT 12V 21A MAX STACKING WARNING This unit may have more than one power input To reduce t...

Страница 25: ...XG or an AT x6EM XS2 stacking module Figure 5 shows the x610 24Ts POE switch front and rear panel Figure 5 x610 24Ts POE Switch 22 SFP 23 21 24 x610 24Ts POE 4 6 8 10 12 3 5 1 2 7 9 11 13 15 17 19 21R...

Страница 26: ...x6EM XS2 stacking module Figure 6 shows the x610 24Ts X POE switch front and rear panel Figure 6 x610 24Ts X POE Switch 22 SFP SFP 23 21 24 25 26 4 6 8 10 12 3 5 1 2 7 9 11 13 15 17 19 21R 16 18 20 22...

Страница 27: ...Figure 7 shows the x610 48Ts POE switch front and rear panel Figure 7 x610 48Ts POE Switch 48R 38 40 42 44 46R 2 4 6 8 10 12 34 36 32 26 28 30 16 14 22 24 18 20 SFP 47 45 47R 37 39 41 43 45R 1 3 5 7...

Страница 28: ...igure 8 shows the x610 48Ts X POE switch front and rear panel Figure 8 x610 48Ts X POE Switch 48R 38 40 42 44 46 2 4 6 8 10 12 34 36 32 26 28 30 16 14 22 24 18 20 SFP 49 SFP 47 47R 37 39 41 43 45 1 3...

Страница 29: ...and set the duplex mode manually through the AlliedWare Plus Operating System Software Note In order for a switch port to successfully Auto Negotiate its duplex mode with a 10 or 100 Mbps end node the...

Страница 30: ...when a port s speed and duplex mode are set through Auto Negotiation automatically configures a switch port to MDI or MDI X depending on the wiring configuration of the port on the end node This feat...

Страница 31: ...r ports to your x610 Series switch The x610 24Ts X x610 24Ts X POE x610 48Ts X and x610 48Ts X POE switches feature additional slots for optional Gigabit Ethernet SFP transceivers as listed in Table 2...

Страница 32: ...Chapter 1 Overview 32 Note For a list of supported SFP and SFP transceivers contact your Allied Telesis sales representative...

Страница 33: ...ombo ports as listed in Table 5 The 10 100 1000Base T ports are identified with the letter R for Redundant as part of their number on the faceplate of the unit Table 3 10 100 1000Base T Ports Matched...

Страница 34: ...ase T port automatically transitions back to the active status when the link is lost on an SFP module In nearly all cases a 10 100 1000Base T port and an SFP module share the same configuration settin...

Страница 35: ...ansfer files between x610 switches Figure 11 SD Card Note An SD card is not required for normal operations of the switch To insert an SD card position it so that the manufacturer s brand label is faci...

Страница 36: ...ex mode collisions Figure 12 shows the port LEDs on the non PoE models Figure 12 Port LEDs on non PoE x610 Series Switches On the PoE models each port has two LEDs labeled L A link activity and PoE Po...

Страница 37: ...ived or transmitted at 10 or 100 Mbps D C Duplex Mode and Collisions Solid Green The port is operating in full duplex mode Solid Amber The port is operating in half duplex mode only applies when opera...

Страница 38: ...X POE switches there is one LINK ACTIVITY LED as shown in Figure 15 and Figure 17 The SFP LED definitions are given in Table 7 and the SFP LED definitions are given in Table 8 Figure 14 SFP LEDs on x6...

Страница 39: ...Table 7 SFP Slot LED Descriptions LED Function State Description L A Link Status and Activity Off No link has been established between the port and the end node Solid Green The port has established a...

Страница 40: ...tween the port and the end node Solid Green The port has established a link at 1 Gbps Flashing Green Packets are being received or transmitted at either 100Mbps or 1 Gbps depending on the transceiver...

Страница 41: ...Descriptions LED State Description FAULT Off Indicates normal operation Solid Red Indicates a fault The switch or the operating system software has malfunctioned Refer to Chapter 5 Troubleshooting on...

Страница 42: ...power supply is physically connected to the switch and may be powered on or off PWR Off The switch is not receiving power Solid Green The switch is receiving power RPS READY at rear Off The RPS is not...

Страница 43: ...EDs Table 10 STACK LED Descriptions LED State Description MSTR Off The switch is not part of a stack or is a member unit of the stack Solid Green The switch is the master unit of the stack L A 1 Off S...

Страница 44: ...port on another VCStack stacking module Flashing Green Stack Port 2 has established a link to a stacking port on another VCStack stacking module and is sending or receiving packet traffic PRES Off Th...

Страница 45: ...ure 21 SD Slot LED Table 11 SD LED Descriptions LED Function State Description SD Link Status and Activity Flashing Amber Indicates a fault has been detected The SD card is not valid or a read or writ...

Страница 46: ...e port The terminal port has an RJ 45 style connector An RJ 45 to RS 232 management cable is supplied with the switch The terminal port is set to the following specifications Default baud rate 9600 bp...

Страница 47: ...ly power to the PoE ports in addition to system power to the switch Warning Do not hot swap the power supply modules Always disconnect the AC cord before the power supply module is removed and ensure...

Страница 48: ...Chapter 1 Overview 48 Figure 23 AT PWR1200 Power Supply 2187 AT PWR1200 100 240VAC 16A MAX DC OUT FAULT...

Страница 49: ...port up to four x610 switches simultaneously depending on the switches configuration The RPS can backup one high power consumption switch or two low power consumption switches with each power supply m...

Страница 50: ...ilable PoE power depends on the PoE rating of the associated power supply module in RPS If the switch is able to get PoE power from both primary power supply and RPS the primary power supply and the p...

Страница 51: ...ports If you need to configure the switch for stacking you may install a VCStack stacking module in place of the AT LBM Module Figure 25 AT LBM Module Installed in x610 48Ts X Expansion Slot Note The...

Страница 52: ...peed of the AT x6EM XS2 is fixed at 10 Gbps Figure 26 AT StackXG Stacking Module Figure 27 AT x6EM XS2 Stacking Module Refer to VCStack Stacking Module Installation on page 79 for the AT StackXG and A...

Страница 53: ...on or off connect or disconnect the power cord For countries that require 100 125 VAC installations the power cord plug provided with the AT PWR1200 power supply has a 20 Amp 125 V NEMA 5 20P plug Th...

Страница 54: ...stor or capacitor is present the switch assumes that the device is a PD Once a PD is discovered a PSE may optionally perform PD classification by applying a DC voltage to the port If the PD supports o...

Страница 55: ...e into the corresponding SFP combo port Power Capacity Either a 250W AT PWR250 800W AT PWR800 or a 1200W AT PWR1200 power supply PSU can be installed in the x610 24Ts POE x610 24Ts X POE x610 48Ts POE...

Страница 56: ...ports Max 24 ports x610 48Ts POE 480W Max 16 ports Max 31 ports x610 48Ts X POE 480W Max 16 ports Max 31 ports Table 15 PoE Ports Supported With AT PWR1200 Power Supply Unit Model Available PoE Power...

Страница 57: ...page 58 The Physical Stack on page 59 Resiliency Link on page 60 Resiliency Link Configurations via Switch Ports on page 61 Stack Formation on page 62 The Role of the Stack Master on page 62 Connecti...

Страница 58: ...link which is an extra out of band data link between stack members In the event of loss of communication across the stacking connection the stack members can determine the status of other members via...

Страница 59: ...is configuration the stack can still function using only a single high speed link Note that stacking ports labeled 1 must connect to stacking ports labeled 2 Also in this example the switches have AT...

Страница 60: ...ation about the stack resiliency link refer to the Stacking Introduction and Stacking Commands chapters in the AlliedWare Plus Operating System Software Reference from www alliedtelesis com POWER SUPP...

Страница 61: ...attaching the switch ports to the VLAN For more information about the stack resiliency link refer to the Stacking Introduction and Stacking Commands chapters in the AlliedWare Plus Operating System So...

Страница 62: ...to automatically select which switch will become the stack master This selection is based on two components 1 The stack member s priority setting 2 The stack member s MAC address The master is the sw...

Страница 63: ...startup scripts Stack Management VLAN Managing the stack is the same as managing an individual switch You can connect to the asynchronous console port of any stack member or you can set an IP address...

Страница 64: ...CK LED Descriptions LED State Description MSTR Off The switch is not part of a stack or is a member unit of the stack Solid Green The switch is the master unit of the stack L A 1 Off Stack Port 1 has...

Страница 65: ...cking ports when using L A 2 Off Stack Port 2 has not established a link to a stacking port on another VCStack stacking module Solid Green Stack Port 2 has established a link to a stacking port on ano...

Страница 66: ...tacking This feature allows x600 and x610 units to be stacked together to form a single stack Note that if a x610 switch is to be part of mixed mode VCStack then an AT StackXG must be installed in the...

Страница 67: ...onnecting the stacking cable from that switch to the master Note Make sure the stacking cables are crossed over between the stack members This means that stack port 1 on switch 1 should connect to sta...

Страница 68: ...k is not operating correctly The master or status LED will be green on the switch that is the stack master 6 Configure the stack as one switch You are now ready to configure the stack with channel gro...

Страница 69: ...leases differ between the stack members significantly then the stack master may not be able to upgrade the new switch automatically If this happens you should see a log message indicating incompatible...

Страница 70: ...ible even if mixed mode stacking is disabled on x610 Series switches For more information about stacking provisioning refer to the Stacking Introduction and Stacking Commands chapters in the AlliedWar...

Страница 71: ...x610 switch The chapter contains the following sections Reviewing Safety Precautions on page 72 Unpacking a Switch on page 75 Installing the Power Cord Retaining Clip on page 76 Installing the Switch...

Страница 72: ...ty of electric shock disconnect electric power to the product before connecting or disconnecting the LAN cables E1 Warning Do not work on equipment or cables during periods of lightning activity E2 Wa...

Страница 73: ...ar le constructeur Les batteries doivent tre limin es conform ment aux instructions du constructeur E22 Warning Mounting of the equipment in the rack should be such that a hazardous condition is not c...

Страница 74: ...this device is located E40 Caution The unit does not contain field serviceable components Please return damaged units for servicing E42 Caution The Ethernet PoE ports are only intended for installatio...

Страница 75: ...maged contact your Allied Telesis sales representative for assistance One non PoE x610 Series Layer 3 Gigabit Ethernet Switch Two rack mount brackets Twelve flathead Phillips rack mount bracket screws...

Страница 76: ...he switches 1 Locate the power cord retaining clip shown in Figure 34 Figure 34 Power Cord Retaining Clip 2 Install the clip on the AC power connector on the rear panel of the switch With the u of the...

Страница 77: ...the bottom of a switch You can leave the feet on 1 Place the switch upside down on a level secure surface 2 Using a flat head screwdriver remove the snap on plastic feet from the bottom of the switch...

Страница 78: ...21 24 x610 24Ts POE 4 6 8 10 12 3 5 1 2 7 9 11 13 15 17 19 21R 16 18 20 22R 24R 14 23R 1000 100 SD STATU S FAULT MASTE R RPS PWR PRES MSTR L A L A CLASS 1 LASER PRODUCT 1 2 STACK BUSY READY FAULT CON...

Страница 79: ...o VCStack stacking modules are available The AT StackXG shown in Figure 39 has two full duplex 12 Gbps stacking ports The AT x6EM XS2 shown in Figure 40 has two 10 Gbps SFP stacking slots Figure 39 AT...

Страница 80: ...all x610 series products Note Do not install an AT StackXG or AT x6EM XS2 stacking module until you have read the latest version of the AlliedWare Plus Release Notes and the x610 Series product docum...

Страница 81: ...e unit and reduces proper airflow and cooling 3 Align the edges of either the AT StackXG or AT x6EM XS2 stacking module with the guides in the slot and carefully slide the module into the chassis unti...

Страница 82: ...tackXG or AT x6EM XS2 stacking module to the chassis by tightening the two captive screws with a cross head screwdriver as shown in Figure 44 and Figure 45 RPS READY STACKING risk of rvicing AT LX44CP...

Страница 83: ...G or AT x6EM XS2 stacking module until you have prepared the switch s Alliedware Plus Operating System software as explained in the AlliedWare Plus Operating System Software Reference Guide RPS READY...

Страница 84: ...le and secure by tightening the two captive thumbscrews 3 Remove the plastic protector from the connector at the other end of the stacking cable and connect it to a Stack Port on the stacking module i...

Страница 85: ...ner and store the packaging material in a safe location 3 Position the transceiver with the label facing up 4 Slide the transceiver into the slot until it clicks into place as shown in Figure 48 Figur...

Страница 86: ...as shown in Figure 50 Figure 50 Removing the Dust Plug from an SFP Transceiver 7 Connect a cable to the SFP transceiver as shown in Figure 51 For SFP optical and cabling specifications consult the do...

Страница 87: ...g module in the next switch of the stack A stacking cable must crossover and connect to a different port on the next stacking module Stack Port 1 on a module must connect to Stack Port 2 on the next m...

Страница 88: ...Chapter 3 Installing the Hardware 88...

Страница 89: ...ollowing sections Twisted Pair and Fiber Optic Specifications on page 90 Installing SFP and SFP Transceivers on page 92 Cabling the 10 100 1000Base T and Fiber Optic Ports on page 94 Powering on a Swi...

Страница 90: ...Auto Negotiation has been disabled defaults to MDI X Disabling Auto Negotiation may require manually configuring a port s MDI MDI X setting or using a crossover cable Table 17 Twisted Pair Cabling an...

Страница 91: ...r 3 Gigabit Ethernet Switches Installation Guide 91 SFP and SFP Transceiver Specifications The specifications for optional SFP and SFP transceivers can be found on our Allied Telesis web site at www a...

Страница 92: ...u do remove the plug keep it for future use Unnecessary removal and insertion of a transceiver can lead to premature failure Warning A transceiver can be damaged by static electricity Be sure to obser...

Страница 93: ...e the transceiver into the slot until it clicks into place as shown in Figure 53 Figure 53 Installing a Transceiver 5 Repeat this procedure to install additional SFP or SFP transceivers or go to Cabli...

Страница 94: ...e network devices can communicate with each other over more than one network path make sure that your switch is properly configured with the appropriate protocol s i e STP ESPR LACP etc Data loops wit...

Страница 95: ...hock Always be sure that the circuit breaker is in the OFF position before connecting the wires to the breaker E9 Warning For centralized DC power connection install only in a restricted access area E...

Страница 96: ...of wire Stripping more than the recommended amount can create a safety hazard by leaving exposed wire on the terminal block after installation E10 Figure 55 Stripped Wire 5 Insert the power supply gr...

Страница 97: ...ands extending from the terminal block Any exposed wiring can conduct harmful levels of electricity to persons touching the wires E12 8 Secure the tray cable near the rack framework using multiple cab...

Страница 98: ...12 Turn the power supply module s On Off switch to On 13 Start a local management session on the unit by performing the procedure Starting a Local Management Session on page 101 Warning This unit migh...

Страница 99: ...Figure 57 Power Cord Retaining Clip in the Up Position 2 Plug the power cord into the AC power connector on the rear panel of the unit as shown in Figure 58 Lower the power cord retaining clip to secu...

Страница 100: ...A 5 20P plug This plug is only compatible with a NEMA 5 20R receptacle See Figure 59 Figure 59 100 125 VAC 125 V NEMA 5 20 Plug and Receptacle Warning This unit might have more than one power supply T...

Страница 101: ...on the front panel of the switch as shown in Figure 60 Figure 60 Connecting the Management Cable to the RJ 45 Terminal Port on the Switch 2 Connect the other end of the cable to an RS 232 port on a t...

Страница 102: ...Chapter 4 Cabling the Network Ports 102 Warranty Registration For warranty information and registration go to the Allied Telesis web site at www alliedtelesis com support warranty...

Страница 103: ...is Not Present on page 107 System Fault LED is Blinking on page 108 System Fault LED is Steadily On on page 109 Cannot Establish a Local Out of Band Management Session on page 110 Switch Functions In...

Страница 104: ...following Make sure the power cord is securely connected to the power source and to the AC connector on the rear panel of the switch Verify that the power outlet has power by connecting another device...

Страница 105: ...speed and duplex mode manually the port defaults to MDI X Disabling Auto Negotiation may require manually configuring a port s MDI MDI X setting or using a crossover cable Make sure that the operating...

Страница 106: ...r an SFP transceiver refer to the installation instructions shipped with the module Check that the operating specifications for instance wavelength and maximum operating distance of the fiber optic po...

Страница 107: ...lled in a transceiver slot but the Uplink Information menu in the AlliedWare Plus Operating System Software interface displays Not Present for that port do the following Verify that the transceiver is...

Страница 108: ...the switch is updating the active boot configuration file or a new version of the operating system software is in the process of being downloaded to the switch The LED stops blinking after the switch...

Страница 109: ...ng Reset the switch by disconnecting and reconnecting the AC power cord If the FAULT LED remains ON download a new version of the switch s operating system software For instructions refer to the Allie...

Страница 110: ...owing Check that the RJ 45 serial management cable is securely connected to the serial terminal port on the switch and to the RS 232 port on the terminal or personal computer Check that the operating...

Страница 111: ...ch Functions Intermittently If a switch functions intermittently check the system hardware status through the management interface Note the current voltage for the power supply compared to the optimum...

Страница 112: ...nfiguration For information on issues with stacking refer to the Allied Telesis Inc website www alliedtelesis com for the Overview of Virtual Chassis Stacking VCS and the Virtual Chassis Stacking sect...

Страница 113: ...x 16 5 in x610 24Ts POE 44 mm x 440 mm x 419 mm 1 72 in x 17 34 in x 16 5 in x610 24Ts X POE 44 mm x 440 mm x 419 mm 1 72 in x 17 34 in x 16 5 in x610 48Ts POE 44 mm x 440 mm x 419 mm 1 72 in x 17 34...

Страница 114: ...C 5 A maximum 50 60 Hz AT PWR250 Module DC 40 60 VDC VAC 6 A maximum AT PWR800 Module 100 240 VAC 12 A maximum 50 60 Hz AT PWR1200 Module 100 240 VAC 16 A maximum 50 60 Hz Table 18 Maximum Power Consu...

Страница 115: ...000 3 3 VCCI Class A C TICK CE EMC Immunity EN55024 Electrical and Laser Safety EN60950 1 TUV EN60825 1 TUV UL 60950 1 CULUS CSA C22 2 No 60950 1 CULUS Quality and Reliability MTBF x610 24Ts 80 000 hr...

Страница 116: ...tion at 10 or 100 Mbps Table 20 lists the pin signal definitions when a port is operating in the MDI X configuration at 10 or 100 Mbps The MDI MDI X setting is established automatically when a port is...

Страница 117: ...hernet Switches Installation Guide 117 Table 21 lists the pin signal definitions when a port operating at 1000 Mbps Table 21 Pin Signals 1000 Mbps Pinout Pair 1 Pair 1 2 Pair 1 3 Pair 2 4 Pair 3 5 Pai...

Страница 118: ...strates the pin layout of the RPS 21 pin D combo port and connector used to connect the AT RPS3000 Redundant Power Supply to x610 Series Switches Figure 62 AT RPS3000 21 Pin Connector Layout Table 22...

Страница 119: ...Status 4 Reserved 5 12V Negative Remote Sense 6 RPS Power Good Active high from RPS to switch This signal is floating when cable is not connected 7 Reserved 8 56V Load Share for PoE Ready port only 9...

Страница 120: ...Appendix A Technical Specifications 120...

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