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Overview of DFE Module Shutdown Procedure

Troubleshooting

4-9

4.3.1

Recommended Shutdown Procedure Using RESET Button

Before pulling a DFE module out of a chassis,

press or tap

on its RESET button for less than 1 second.

Its CPU LED changes from solid green to blinking between green and amber, indicating that the
DFE module is shutting down. At the end of the DFE module shutdown routine, the CPU LED
changes to a 67%/33% sequence of amber/off, respectively, indicating the module is in a halt state.
In this time it is safe to restart or remove the DFE module from the chassis.

When a controlled shutdown is initiated from the RESET button, you have 60 seconds from the
time the CPU starts flashing amber/off until the time the device is automatically restarted.

4.3.2

Last Resort Shutdown Procedure Using RESET Button

To reset a DFE module without it performing an orderly shutdown routine,

press and hold

the RESET button for approximately 6 seconds.

Pulling any DFE module out of the chassis before it has been shut down is not recommended. The
only safe time to pull a module out of the chassis is after the completion of a shutdown and the
management LED is flashing amber/off.

Caution:

Do not pull any DFE module out of an operating chassis before it has

completed its shutdown routine.

Precaución:

No retire los módulos DFE del chasis en funcionamiento hasta que no se

haya terminado con la rutina de apagado.

NOTE:

The only safe time to pull a DFE module out of the chassis is when the CPU

LED is blinking amber. Otherwise, system operation will be interrupted.

Caution:

This method of shutting down a DFE module is not recommended except as a

last resort, because all processes currently running on the module will be interrupted
resulting in loss of frames.

Precaución:

No se recomienda utilizar este método para apagar los módulos DFE.

Recurra a él sólo como último recurso, puesto que interrumpe todos los procesos del
módulo en funcionamiento, lo que podría resultar pérdidas de frames.

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Содержание Matrix 7G4202-30

Страница 1: ...Enterasys Matrix DFE Platinum Series Hardware Installation Guide 7H4382 49 7H4383 49 7G4270 12 7G4202 30 7H4203 72 P N 9033835 09...

Страница 2: ......

Страница 3: ...2008 Enterasys Networks Inc All rights reserved Part Number 9033835 08 July 2008 ENTERASYS ENTERASYS NETWORKS ENTERASYS MATRIX LANVIEW ENTERASYS NETSIGHT WEBVIEW and any logos associated therewith are...

Страница 4: ...pment Industry Canada Notice This digital apparatus does not exceed the class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian De...

Страница 5: ...ectrical and Electronic Equipment European Waste Electrical and Electronic Equipment WEEE Notice In accordance with Directive 2002 96 EC of the European Parliament on waste electrical and electronic e...

Страница 6: ...is above the relevant threshold of the SJ T 11363 2006 standard This table shows where these substances may be found in the supply chain of Enterasys electronic information products as of the date of...

Страница 7: ...VCCI If this equipment is used in a domestic environment radio disturbance may arise When such trouble occurs the user may be required to take corrective actions BSMI EMC Statement Taiwan This is a c...

Страница 8: ...mmittee for Electrotechnical Standardization When operating within their performance limitations laser transceiver output meets the Class 1 accessible emission limit of all three standards Class 1 lev...

Страница 9: ...exus House Newbury Business Park London Road Newbury Berkshire RG14 2PZ England Conformance to Directive s Product Standards EC Directive 2004 108 EC EN 55022 EN 61000 3 2 EN 61000 3 3 EN 55024 EC Dir...

Страница 10: ...F YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT OR ARE NOT AUTHORIZED TO ENTER INTO THIS AGREEMENT ENTERASYS IS UNWILLING TO LICENSE THE PROGRAM TO YOU AND YOU AGREE TO RETURN THE UNOPENED PRODUCT T...

Страница 11: ...ced direct product is subject to national security controls as identified on the U S Commerce Control List or iii if the direct product of the technology is a complete plant or any major component of...

Страница 12: ...iers All rights not specifically granted to You shall be reserved to Enterasys 10 ENFORCEMENT You acknowledge and agree that any breach of Sections 2 4 or 9 of this Agreement by You may cause Enterasy...

Страница 13: ...Policy Support 1 8 1 6 Standards Compatibility 1 8 1 7 LANVIEW Diagnostic LEDs 1 8 2 NETWORK REQUIREMENTS 2 1 Link Aggregation 2 1 2 2 Module Placement in a Matrix E7 Chassis 2 2 2 3 FTM Bridge Funct...

Страница 14: ...tallation 3 34 3 9 1 Completing the Installation of a New System 3 34 3 9 2 Completing the Installation of a DFE Module in an Existing System 3 36 4 TROUBLESHOOTING 4 1 Using LANVIEW 4 1 4 2 Troublesh...

Страница 15: ...TALLATIONS B 1 Required Tools B 1 B 2 Setting the Mode Switches B 2 B 3 Memory Locations and Replacement Procedures B 5 B 3 1 DRAM SIMM Replacement Procedure for 7H4382 49 and 7H4383 49 B 6 B 3 2 DIMM...

Страница 16: ...xiv...

Страница 17: ...gment Using RJ21 Straight Connector 3 21 3 13 Connection Using Optional RJ21 Angle Adapter 3 22 3 14 Example of Cable Placement When Using Optional RJ21 Angle Adapters 3 23 3 15 Cable Connection to MT...

Страница 18: ...xvi Figures Figure Page B 11 Installing the DRAM SIMM B 11 B 12 Removing the Existing DIMM B 13 B 13 Installing the DIMM B 14...

Страница 19: ...4 MGBIC LC01 MGBIC MT01 Operating Range A 4 A 5 MGBIC LC03 Optical Specifications A 5 A 6 MGBIC LC03 Operating Range A 5 A 7 MGBIC LC09 Optical Specifications A 5 A 8 MGBIC LC09 Operating Range A 6 A...

Страница 20: ...xviii Tables...

Страница 21: ...ing Engine series of modules DFE module or module refers to the 7H4382 49 7H4383 49 7G4270 12 7G4202 30 or 7G4203 72 If the information applies only to one of the modules the module is referred to by...

Страница 22: ...ng Guide provides information on dB loss and cable specifications Unlike the Enterasys Matrix DFE Platinum Series Configuration Guide the Cabling Guide is not listed alphabetically on the web site Ins...

Страница 23: ...ichtige Informationen zum Schutz gegen Besch digungen Electrical Hazard Warns against an action that could result in personal injury or death due to an electrical hazard Riesgo Electrico Advierte cont...

Страница 24: ...ion of your network environment for example layout and cable type Network load and frame size at the time of trouble if known The device history for example have you returned the device before is this...

Страница 25: ...t connectivity Integrated Services Design that reduces the number type of modules required simplifies network design and lowers entry cost Port and User Based Policy and Multilayer Packet Classificati...

Страница 26: ...ex mode can be determined by either auto negotiation or manual configuration The DFE module ports can be configured to control traffic by limiting the rate of traffic accepted into the module and prio...

Страница 27: ...erconnection from FTM2 to FTM1 can only be accomplished via a bridging module such as the 7H4382 25 7H4382 49 7H4383 49 or 7H4385 49 7G4202 30 The 7G4202 30 DFE module has 30 10BASE T 100BASE TX 1000...

Страница 28: ...a RJ45s 5 GROUP SELECT switch 7H4383 49 Ports 1 48 10 100 Mbps via four RJ21s 12X 1X 24X 13X RESET COM CPU MGMT GROUP SELECT GROUP 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 36X 25X 48X 37X G R O U P 2 G R O...

Страница 29: ...Ports 1 72 10 100 Mbps via six RJ21s 7G4202 30 7H4203 72 GROUP SELECT switch GROUP GROUP SELECT RESET COM CPU MGMT 9X 19X 1X 11X 29X 21X G R O U P 1 G R O U P 2 G R O U P 3 1 2 3 4 5 6 7 8 9 10 1 2 3...

Страница 30: ...ed ports and an optional network expansion module 7H4383 49 Depending on how the 7H4383 49 DFE module Figure 1 1 is configured it can support up to 48 10BASE T 100BASE TX switched ports connected thro...

Страница 31: ...7H4203 72 DFE module has 10BASE T 100BASE TX compliant ports via six RJ21 front panel connectors The 7H4203 72 only supports FTM2 data backplane interconnections in the Matrix E7 chassis Interconnecti...

Страница 32: ...ces are logical groups of Classification Rules that identify specific networked applications or services Users may be permitted or denied access to these services based on their role within the organi...

Страница 33: ...is a method of grouping multiple physical ports on a network device into one logical link according to the IEEE 802 3ad 2002 standard Because Link Aggregation is standards based it allows for automati...

Страница 34: ...also follow the module placement rules described in Section 3 4 to successfully bridge data traffic to some or all modules in the chassis 2 3 FTM BRIDGE FUNCTION AND NETWORK EXPANSION MODULE The 7H43...

Страница 35: ...er to Appendix A for further details on Mini GBIC specifications 2 7 1000BASE T NETWORK The 7G4202 30 DFE module provides 30 ports that support 10 100 1000 Mbps via RJ45 front panel connectors These c...

Страница 36: ...1000BASE T Network 2 4 Network Requirements...

Страница 37: ...trix N3 Matrix N1 or Matrix N5 Chassis Section 3 6 Connecting to the Network Section 3 7 Connecting to COM Port for Local Management Section 3 8 Completing the Installation Section 3 9 Electrical Haza...

Страница 38: ...elease notes or the Enterasys Networks web site for the latest available network expansion modules NEMs A Phillips screwdriver is required to install an optional NEM into the 7H4382 49 or 7H4383 49 DF...

Страница 39: ...adaptador de la red Warnhinweis Mini GBICs mit Fiber Optik Technologie benutzen Laser der Klasse 1 Benutzen sie keinesfalls optische Hilfsmittel um die Funktion des Lasers zu berpr fen Solche Hilfsmi...

Страница 40: ...ion refer to Figure 3 2 or for an RJ45 connection refer to Figure 3 3 and proceed as follows 1 Hold the Mini GBIC with its top side facing up and its 7 pin edge connector facing the port slot 2 Carefu...

Страница 41: ...Mini GBIC with RJ45 Connector 1 Mini GBIC MGBIC LC01 or MGBIC LC09 4 Port slot 2 Mini GBIC top side 5 Mini GBIC protective dust cover 3 7 Pin edge connector insertion side 6 Release tab 1 Mini GBIC MG...

Страница 42: ...GBIC insert its dust protector to protect its fiber optic ports Caution Do NOT remove a Mini GBIC from a slot without releasing the locking tab located under the front bottom end of the Mini GBIC This...

Страница 43: ...nnect to FTM1 except through an FTM bridging module such as the 7H4382 25 7H4382 49 7H4383 49 or the 7H4385 49 The 7H4382 49 has a connection to both FTM1 and FTM2 backplanes which enables the 7H4382...

Страница 44: ...These modules communicate with each other via the FTM2 chassis backplane and act as a single switching entity with one IP address The DFE modules are configured using a Command Line Interface set of c...

Страница 45: ...ule provides a proxy bridge which enables the 6x1xx and 6x2xx modules to communicate with 6x3xx modules in slot 6 or 7 If more than one 6x3xx module is installed in slots 1 to 5 the module in the lowe...

Страница 46: ...ules will not communicate with any other modules in the chassis Rule In this example there must be at least one 6x3xx series module and a 7H4382 25 7H4382 49 7H4383 49 or 7H4385 49 bridging module in...

Страница 47: ...and plug the cable from the antistatic wrist strap into the ESD grounding receptacle at the upper right corner of the chassis 4 Remove the module from the plastic bag Save the bag in the event the mod...

Страница 48: ...ver lines up with the desired slot number located on the front panel of the chassis Refer to Figure 3 5 Precauci n Para evitar que se da en los conectores del panel posterior en el siguiente paso inte...

Страница 49: ...tal back panel Top two connectors power and FTM2 Bottom two connectors power and FTM1 no bottom connectors in Matrix N7 chassis 1 SERIES E7 4 5 6 7 2 3 50 60Hz LINE 100 125V 12A 200 240V 6A 50 60Hz LI...

Страница 50: ...ects contacting the board or components can cause damage Precauci n Si no toma las medidas de seguridad necesarias para evitar descargas de electricidad est tica es posible que el m dulo se da e Siga...

Страница 51: ...lot is slot 3 6 Lower locking tab shown in closed position 3 Module card 7 FTM2 backplane connectors 4 Metal back panel 7C203 1 REDUNDANCY PWR 100 125V 12 0A 200 240V 6 0A 50 60 Hz 7C203 1 REDUNDANCY...

Страница 52: ...ity sensing eliminates the need for a crossover cable regardless if the connection is to another network device or a workstation In this procedure the 7H4382 49 is used as the example to connect a twi...

Страница 53: ...4 Each time the GROUP SELECT button is pressed the GROUP LED lights up in sequence indicating which Group is selected The receive and transmit activity for that group of segments is then indicated by...

Страница 54: ...Figure 3 11 for eight wire RJ45 connections Figure 3 8 Crossover 4 Wire Cable RJ45 Pinouts Connections Between Hub Devices Figure 3 9 Straight Through 4 Wire Cable RJ45 Pinouts Connections Between Sw...

Страница 55: ...onnections Between Switches and End User Devices 1 RJ45 device port 3 RJ45 to RJ45 crossover cable 2 Other device port 1 RJ45 device port 3 RJ45 to RJ45 straight through cable 2 Other device port 2 1...

Страница 56: ...RJ21 cable connectors or right angle RJ21 connectors with optional RJ21 angle adapters To connect a UTP segment to the 7H4383 49 or 7H4203 72 proceed as follows 1 Ensure that the device connected to...

Страница 57: ...t angled connector into the RJ21 angle adapter until the two retaining clips snap into place As shown in Figure 3 14 the RJ21 angle adapter allows the cables to be positioned along the front of the de...

Страница 58: ...on Using Optional RJ21 Angle Adapter 1 RJ21 angle adapter 4 RJ21 right angled connector 2 RJ21 port connector 5 Retaining clips 3 Retaining screws 12X 1X RESET COM CPU MGMT GROUP SELECT GROUP 1 2 3 4...

Страница 59: ...the receive and transmit activity on a group of segments press the GROUP SELECT button see Figure 3 7 to step to the group of interest Groups 1 through 4 Each time the GROUP SELECT button is pressed t...

Страница 60: ...etwork or other devices to Mini GBIC MT RJ or LC port connectors installed in the 7G4270 12 DFE module or optional NEM Each fiber optic link consists of two fiber optic strands within the cable Transm...

Страница 61: ...s clean A cleaning swab saturated with optical grade isopropyl alcohol may also be used to clean the ends Precauci n No toque los extremos de los cables de fibra ptica y evite su contacto con el polvo...

Страница 62: ...15 Cable Connection to MT RJ Fiber Optic Connectors 1 Installed Mini GBIC MT RJ connector 4 Receive LED RX 2 MT RJ cable connector 5 Transmit LED TX 3 Release tab 7G4270 12 6 5 4 3 2 1 12 10 11 9 8 7...

Страница 63: ...ecking that the port RX LED is on flashing amber blinking green or solid green If the RX LED is off perform the following steps until it is on 1 Installed Mini GBIC LC connector 4 Receive LED RX 2 LC...

Страница 64: ...r optic strand is connected to the receive port and the receive fiber optic strand to the transmit port 3 8 CONNECTING TO COM PORT FOR LOCAL MANAGEMENT This section describes how to install a UTP cabl...

Страница 65: ...ort is also known as a Console port 2 Plug the RJ45 connector at the other end of the cable into an optional RJ45 to DB9 adapter 3 Connect the RJ45 to DB9 adapter to the communications port on the IBM...

Страница 66: ...at one end of the cable to the COM port on the Enterasys Networks module 2 Plug the RJ45 connector at the other end of the cable into the RJ45 to DB25 female adapter 3 Connect the RJ45 to DB25 adapte...

Страница 67: ...UTP cable with RJ45 connectors and an optional RJ45 to DB25 male adapter and proceed as follows 1 Connect the RJ45 connector at one end of the cable to the COM port of the module 2 Plug the RJ45 conn...

Страница 68: ...hen these parameters are set the Local Management password screen will display Refer to the Enterasys Matrix DFE Platinum Series Configuration Guide for further information Figure 3 19 Connecting to a...

Страница 69: ...5 Green 5 Ground GRD 2 Orange 7 Request to Send RTS 6 Yellow 8 Clear to Send CTS VT Series Port Adapter Wiring and Signal Diagram RJ45 DB25 Pin Conductor Pin Signal 4 Red 2 Transmit TX 1 Blue 3 Recei...

Страница 70: ...values A complete list of the factory default values are provided in Chapter 3 of the Enterasys Matrix DFE Platinum Series Configuration Guide After installing all DFE modules into the host chassis a...

Страница 71: ...t settings for remote access to DFE management refer to Chapter 3 in the Enterasys Matrix DFE Platinum Series Configuration Guide The CLI commands enable you to initially set up and perform more invol...

Страница 72: ...hat account are already recognized by the new DFE module and it will operate accordingly If you need to change any settings you can connect a terminal to the local console port as described in Section...

Страница 73: ...DFE Platinum Series Configuration Guide The CLI commands enable you to initially set up and perform more involved management configurations The Enterasys Matrix DFE Platinum Series Configuration Guid...

Страница 74: ...Completing the Installation 3 38 Installation...

Страница 75: ...e is serving as the Management Module to control the management functions for all DFE modules in the chassis The Management Module handles all IP requests to the chassis IP address such as PING Telnet...

Страница 76: ...ications and provides recommended actions as appropriate 1 MGMT LED 2 Group 1 Port 1 LEDs NOTE The terms used in Table 4 1 indicate the following Flashing indicates an LED is flashing randomly Blinkin...

Страница 77: ...dequate power Amber Blinking Module in process of booting None Solid Testing If the LED remains amber for several minutes contact Enterasys Networks for technical support Green Blinking Image starts r...

Страница 78: ...t enabled traffic is being received by the interface None RX Red Blinking Indicates collisions This indication is only supported on 10 100 ports Contact Enterasys Networks for technical support TX Tra...

Страница 79: ...power No Local Management Password screen Incorrect terminal setup Refer to the Enterasys Matrix DFE Platinum Series Configuration Guide for proper setup procedures Improper console cable pinouts Refe...

Страница 80: ...s Matrix DFE Platinum Series Configuration Guide for information about Host Port and management VLAN configuration No link to device Verify that all network connections between the network management...

Страница 81: ...the user entered parameters to reset to factory default settings Clear Persistent Data that was set through Local Management The module was moved either from slot to slot or from chassis to chassis R...

Страница 82: ...e network before the change is made thereby increasing network availability You can shut down a DFE module in an operating system using the RESET button shown in Figure 4 2 There are two procedures to...

Страница 83: ...ss and hold the RESET button for approximately 6 seconds Pulling any DFE module out of the chassis before it has been shut down is not recommended The only safe time to pull a module out of the chassi...

Страница 84: ...Overview of DFE Module Shutdown Procedure 4 10 Troubleshooting...

Страница 85: ...MODULE SPECIFICATIONS Table A 1 provides the I O ports processors and memory physical and environmental module specifications for the 7H4382 49 7H4383 49 7G4270 12 7G4202 30 and 7H4203 72 DFE modules...

Страница 86: ...nt ports via six RJ21 connectors Processors Memory Processor MPC750CX 400 MHz processor Dynamic Random Access Memory DRAM 256 MB FLASH Memory 32 MB Physical Dimensions 46 43 H x 6 05 W x 29 51 D cm 18...

Страница 87: ...C01 Provides one LC fiber optic multimode port that is compliant with the 1000BASE SX standard LC connector MGBIC LC03 Provides one LC fiber optic multimode port that is compliant with the 1000BASE SX...

Страница 88: ...C MT01 Specifications 1000BASE SX Table A 3 MGBIC LC01 MGBIC MT01 Optical Specifications Item 62 5 m MMF 50 m MMF Transmit Power minimum 9 5 dBm 9 5 dBm Receive Sensitivity 17 dBm 17 dBm Link Power Bu...

Страница 89: ...ltimode fiber optic cable segment Use the Link Power Budget to calculate the maximum cable length of the attached segment The Link Power Budget must not exceed those specified in this table The MGBIC...

Страница 90: ...pical 5 dBm max Receive Sensitivity 24 dBm min 26 dBm typical Maximum Input Power 3 dBm Link Power Budget1 Full Duplex Only 1 The maximum drive distance up to 70 km depends on the quality of the insta...

Страница 91: ...ported Cable Type Maximum Length Copper Category 5 UTP Up to 100 meters Connector RJ45 Data Rate 1 Gbps IEEE 802 3 2000 compatible 1000BASE T operation only Automatic crossover detection TX Output imp...

Страница 92: ...ta XMT Output 2 Data Carrier Detect DCD Output 3 Data Set Ready DSR Input 4 Receive Data RCV Input 5 Signal Ground GND NA 6 Data Terminal Ready DTR Output 7 Request to Send RTS Input 8 Clear to Send C...

Страница 93: ...ing tools to perform the procedures provided in this appendix Antistatic wrist strap Phillips screwdriver Caution An antistatic wrist strap is required to perform the procedures in this appendix Use t...

Страница 94: ...u can either use the factory default settings or reenter your own parameters Switch 8 Clear Admin Password Changing the position of this switch clears the admin password and restores the factory defau...

Страница 95: ...h Location on 7H4382 49 and 7H4383 49 Figure B 2 Mode Switch Location on 7G4270 12 1 Mode switch bank located in same location on both the 7H4382 49 and 7H4383 49 1 Mode switch bank ON 1 2 3 4 5 6 7 8...

Страница 96: ...s module names etc are reset to the factory default settings Once the module resets you can either use the factory default settings or reenter your own parameters 1 Mode switch bank 1 Mode switch bank...

Страница 97: ...lace these memory modules If you have questions concerning the replacement of either memory module refer to Getting Help on page xxii for details on how to contact Enterasys Networks Location of DIMM...

Страница 98: ...382 49 or 7H4383 49 refer to Figure B 7 and Figure B 8 respectively and proceed as follows Removing the DRAM SIMM 1 If there is an optional NEM installed on the main board of the 7H4382 49 or 7H4383 4...

Страница 99: ...IMM Connector Location 7H4382 49 or 7H4383 49 2 Refer to Figure B 8 Push the connector arms away from the memory module to release it from the connector 3 Remove the module from the connector 1 NEM no...

Страница 100: ...ector fingers and push the memory module into the connector until the tabs on the two connector arms pull in towards the DRAM SIMM alignment notches 2 Push the DRAM SIMM further into the connector unt...

Страница 101: ...on the main PC board Refer back to Figure B 6 2 Push the connector arms away from the DRAM SIMM as shown in Figure B 10 enough to release the DRAM SIMM from the connector contacts 1 Connector arms 3 C...

Страница 102: ...nough to insert the DRAM SIMM into the connector contacts 2 Insert the DRAM SIMM straight down between the connector contacts enough for the tabs on the connector arms to align with the two DRAM SIMM...

Страница 103: ...s and Replacement Procedures Mode Switch Bank Settings and Optional Installations B 11 Figure B 11 Installing the DRAM SIMM 1 DRAM SIMM Connector arms 3 Connector contacts 2 DRAM SIMM 4 DRAM SIMM alig...

Страница 104: ...on on either the 7H4382 49 or 7H4383 49 Refer back to Figure B 6 for the location on the 7G4270 12 7G4202 30 or 7H4203 72 2 Push the connector arms away from the DIMM as shown in Figure B 12 and simul...

Страница 105: ...ivot the DIMM downward so the tabs on the connector arms align with the two DIMM alignment notches With the two connector arms spread outward push the DIMM down between the connector arms Then release...

Страница 106: ...mory Locations and Replacement Procedures B 14 Mode Switch Bank Settings and Optional Installations Figure B 13 Installing the DIMM 1 DIMM 3 Connector arms 2 Connector fingers 4 DIMM alignment notches...

Страница 107: ...SE TX network 2 3 10BASE T network 2 2 CLI command introduction to 1 7 COM port connections what is needed 3 28 Connecting to the network 3 16 Connectivity DFE module and network expansion module 1 6...

Страница 108: ...nstallation into 3 14 Memory replacement of DRAM B 12 Memory locations DIMM and SIMM B 5 MGBIC 02 specifications for A 7 MGBIC 08 specifications for A 6 MGBIC LC01 MGBIC MT01 specifications for A 4 MG...

Страница 109: ...ting range A 5 optical A 5 Specifications MGBIC LC09 operating range A 6 optical A 5 Specifications MGBIC MT01 operating range A 4 optical A 4 Standards compatibility 1 8 T Technical support contatact...

Страница 110: ...Index 4...

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