MRV Communications LX-8000 Series Скачать руководство пользователя страница 53

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MRV Communications, Inc.

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Appendix C - POST Test Error Codes

POST Test Error Code Sample

NOTE:

This example applies to 20 and 40 port LX-8000 units. The 20 and 40 port LX
units use only the first eight LEDs when generating error codes.

The following sample illustrates the Port Status LED sequence for Error 2030 (Reading Invalid Value
from PLD System Fail Status Register) on the LX-8020. In this example:

1. A POST test failure occurs on an 20-port unit. All LEDs flash eight times, very quickly, then the error

code is displayed.

2. You record that LED 3 turns on. Again, all LEDs flash eight times very quickly, then the rest of the error

code is displayed.

3. You record that LEDs 3 and 4 turn on. Figure 15 explains how to interpret the sample error code.

NOTE:

In hexadecimal, 0 indicates the LED is OFF. 1 indicates the LED is ON.

Each group of four LEDs is converted to a hexadecimal value as follows:

•

0 = 0000

•

1 = 0001

•

2 = 0010

•

3 = 0011

•

4 = 0100

•

5 = 0101

•

6 = 0110

•

7 = 0111

•

8 = 1000

•

9 = 1001

•

A = 1010

•

B = 1011

•

C = 1100

•

D = 1101

•

E = 1110

•

F = 1111

Содержание LX-8000 Series

Страница 1: ...ternet MRV Americas Service and Support 295 Foster Street Littleton MA 01460 Tel 800 435 7997 Tel 001 978 952 4888 Outside U S Email service mrv com MRV America Sales 295 Foster Street Littleton MA 01460 Tel 800 338 5316 U S Email sales mrv com MRV International Sales Business Park Moerfelden Waldeckerstrasse 13 64546 Moerfelden Walldorf Germany Tel 49 6105 2070 Fax 49 6105 207 100 Email sales mrv...

Страница 2: ...993 6200 FCC Notice CAUTION 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 residential installation This equipment generates uses and can radiate radio frequency energy and if not installed ...

Страница 3: ...sed in a domestic environment radio disturbance may arise When such trouble occurs the user may be required to take corrective actions EXPORT NOTICE MRV models contain 128 bit encryption software Export of this product is restricted under U S law Information is available from the U S Department of Commerce Bureau of Export Administration at www bxa doc gov WARNING Both power sources must be discon...

Страница 4: ...4 MRV Communications Inc www mrv com 451 0331 ...

Страница 5: ... 21 Modem Port Optional 22 Powering On 22 System Login and Passwords 22 Resetting the Unit 23 Configuring the LX 8000 Series for the First Time 25 Configuring the LX 8000 Unit for the First Time 25 First Time Quick Configuration 25 Assigning an IP Address via the Network 27 Manually Setting the IP Address Via the CLI 28 Accessing and Configuring the Graphical User Interface GUI 28 Configure Mode 3...

Страница 6: ...nd Usage 42 Appendix A Technical Specifications 45 Appendix B Factory Defaults 49 ppciboot Factory Default Settings 50 Appendix C POST Test Error Codes 51 Error Code Definitions 51 POST Test Error Code Sample 53 Appendix D Cabling the LX 8000 Series 55 Cabling Considerations 55 Serial Device Connectors 55 Diagnostic Port Connector Port 0 55 10 100 Connector 56 Ordering Cables 56 Modular Adapters 5...

Страница 7: ...re 35 Connecting the Temperature Humidity Sensor 38 Connecting the IR 5150 39 Connecting the IR 4800 40 Typical Alarm Inputs Connections 42 Typical Interface Design for Control Output Signals 43 POST Test Error Code Sample 54 Serial Device Connector RJ 45 Signal Assignments 55 10 100 Connector Assignments 56 DB 25 Pins 57 Adapter Wiring LX Series to DTE 59 Adapter Wiring RJ 45 to DB 9 LX Series to...

Страница 8: ...8 MRV Communications Inc www mrv com 451 0331 ...

Страница 9: ...451 0331 MRV Communications Inc www mrv com 9 Tables LX 8000 Series Specifications 45 Temperature Humidity Sensor Specifications 47 LX 8000 Series Factory Defaults 49 POST Test Error Codes 51 ...

Страница 10: ...10 MRV Communications Inc www mrv com 451 0331 ...

Страница 11: ...terface install Java Runtime Environment JRE and connect to the LX 8000 Series via telnet and SSH Chapter 4 Describes alternative port capabilities including temperature humidity sensors IR 4800 5150 power control units and using LX ports as alarm input and control output port points Appendix A Provides the electrical environmental and physical requirements for the LX 8000 Series installation Appe...

Страница 12: ...nformation on network configuration initial setup how to set up for remote console functions RADIUS and system administration Provides basic information regarding the Network Management System NMS and procedures on how to use the Management Information Base MIB structure as pointers to objects in the devices to manage these units Software Release Notes Cites supported features as well as any notes...

Страница 13: ...nd configure the remote network devices and servers as well as perform software upgrades as if attached locally The LX 8000 Series is available in two base models the 20 port LX 8020S and the 40 port LX 8040S each with single or dual AC power supplies or dual DC power supplies and an optional internal modem The LX 8000 Series also provides 20 and 40 port densities of RS 232 DTE RJ45 Serial ports a...

Страница 14: ...nput messages prompts etc italics are used to indicate variables in command syntax descriptions Help Key At any prompt level you can press to display the available commands at that level The only time this is not true is if you are in the midst of entering a command If is at the end of a partial command the LX displays a list of valid arguments to assist you in adding to the current command line T...

Страница 15: ...r your distributor you should return it in the original carton Package Contents The LX 8000 unit shipping carton contains the following items One rack mounting kit MRV provides the following mounting screws Eight 6 32 x 5 16 flathead screws for attaching the ears to the unit and four 10 32 screws to attach to the rack One power cord appropriate to your particular AC LX model two power cords on red...

Страница 16: ... section explains the front panel LEDs see Figures 1 and 2 Figure 1 LX Series 8020 Front Panel Figure 2 LX Series 8040 Front Panel 100 Mbps This green LED indicates speed If the link is 100 Mbps the LED comes ON Modem Port DIAG MGMT Port Speed Indicator for ETH1 and ETH2 OK FLT LEDs SYS FEED REG TEMP LEDs Modem Port DIAG MGMT Port Speed Indicator for ETH1 and ETH2 OK FLT LEDs SYS FEED REG TEMP LED...

Страница 17: ...t systems the B feed will be off This LED turns green when a cable is plugged into the A or B side of the AC or DC feed and power is present the range is 90V to 230V The B side is present only on redundant systems The FEED LEDs only indicate whether or not power is present at each input connector The LED turns red when power is lost on the A or B side of the AC or DC feed A and B REG NOTE On non r...

Страница 18: ...rious LX 8000 models see Figure 3 through Figure 5 Figure 3 LX Series Dual AC 8040 Rear Panel Figure 4 LX Series Single AC 8040 Rear Panel Figure 5 LX Series DC 8040 Rear Panel Dual AC Connectors 10 100 Ethernet Interface RCV ActivityLink LED Single AC Connector 10 100 Ethernet Interface RCV Activity Link LED DC Connector 10 100 Ethernet Interface RCV Activity Link LED ...

Страница 19: ...n the side s of the unit that might block airflow through the unit The unit may be front rear or center mounted There is no mounting difference between the 19 and 23 rack mount ears Mounting the Unit into a 19 inch or 23 inch Rack Attach the brackets to the unit and then mount the unit in the rack Refer to Figure 6 for further information Figure 6 Mounting an LX 8000 Series in Rack The three botto...

Страница 20: ...ands Reference Guide for further details Connect a category 3 CAT 3 cable for 10 Mbps operation or a category 5 CAT 5 cable for 10 100 Mbps operation to the 10 100 connector s on the rear of the LX 8000 Series see Figure 3 and the other end to your network The LINK LED comes on steady green if the cable is properly connected Connect Serial Device Cables Connect the serial device cables to the 8 pi...

Страница 21: ...rk should be made per local practices using wire with a minimum conductor size of 18 AWG 2 Use the two 10 screws included on the rear panel to secure the grounding lug to the chassis 3 Using a inch nut driver remove the terminal block nuts 4 Attach the facility s A feed to the terminal block labeled A NOTE Be sure that the 48VDC is connected to the minus side and the 48VDC return is connected to t...

Страница 22: ... neither the unit boots on its own after eight seconds If you type L a password prompt appears The default password is access The Main Menu appears after you enter the password The Main Menu allows you to change the boot settings and IP address assignments You can review the factory default boot setting by referring to the Additional Considerations for an Internet Environment on page 36 The system...

Страница 23: ...efer to Figure 8 for the exact location Figure 8 LX Series RESET Switch Location When the LX 8000 Series enters the RESET state all front panel LEDs illuminate When you release the reset button the unit begins to execute the Power On Self Test POST If the LX 8000 Series detects an error the red FLT LED comes on and the front panel LEDs light up to display an error code This error sequence is repea...

Страница 24: ...Installing the LX 8000 Series 24 MRV Communications Inc www mrv com 451 0331 ...

Страница 25: ...dress Manually Refer to Manually Setting the IP Address Via the CLI Creating and Loading a Default Configuration File Refer to Applying Default Configurations to Other Units in the LX Series Configuration Guide Configuring the LX 8000 Manually via the CLI Refer to Upgrading Software with the ppciboot Main Menu in the LX Series Configuration Guide First Time Quick Configuration NOTE The first time ...

Страница 26: ...ration menu appears 5 Press the number corresponding to the parameter you want to set 6 Enter the appropriate information and press Enter to return to the Quick Configuration menu Once you enter a parameter value a data entry line specific to that parameter appears on the Quick Configuration menu 7 Continue in this way through the menu configuring as many parameters as you want You are not require...

Страница 27: ...nce Guide for information on specific commands To use Telnet refer to Connecting to the LX 8000 Series via Telnet or SSH on page 33 To use the web browser refer to Accessing and Configuring the Graphical User Interface GUI on page 28 Assigning an IP Address via the Network If you are running DHCP BOOTP or RARP the LX 8000 obtains its own IP information automatically while it boots Once the unit ha...

Страница 28: ...ppears 8 Enter interface 1 and press Enter The Intf 1 1 0 prompt appears 9 Enter address ip_address mask network_mask and press Enter The Intf 1 1 0 prompt reappears 10 Enter broadcast broadcast_address and press Enter The Intf 1 1 0 prompt reap pears 11 Enter exit and press Enter The Config 0 prompt appears 12 Enter gateway gateway_address and press Enter The Config 0 prompt reappears 13 Enter ex...

Страница 29: ...ormed automatically if the GUI sees that the plugin version is out of date or not available at all If for some reason your PC does not download the Java plug in automatically click on the Download link and install the software manually from the http java sun com web site 2 If you need to download Java the following window appears automatically 3 Click Yes The plugin is downloaded and then the inst...

Страница 30: ...pending on your PC operating system 6 Click on Grant this session The Java Security Warning window closes The LX Series Console page reappears now with the green console selection visible 7 Choosing Encrypted Console means the GUI will run slower but with security Choosing Not Encrypted Console means the GUI will run faster but without security 8 Select Encrypted or Not Encrypted and then select L...

Страница 31: ...pears depends on which mode you are authorized to configure and monitor Refer to Configure Mode on page 31 or Menu Mode on page 32 depending on which mode you can access Configure Mode If you are authorized to access the Configure Mode do the following 1 If you log in as a user the following window appears 2 To log in as a superuser click the Admin button on the tool bar and log in with the defaul...

Страница 32: ...k on the menus on the left side of the window For example selecting Ports Async opens the Async ports window Menu Mode If you have access to the Menu Mode the following screen appears when you login Click on the various menu items on the left side of the window to perform preconfigured menu option tasks ...

Страница 33: ...lowing sections describe additional LX 8000 features you can access and configure Connecting to the LX 8000 Series via Telnet or SSH Telnet Directly into the Communication Server NOTE The default telnet port is 23 The default SSH port is 22 1 Telnet to the unit from your machine 2 Enter your subscriber login name then your password 3 If you entered the password correctly the user prompt is display...

Страница 34: ...and line interface port from a dumb terminal attached to an LX Series serial port which is set for access local or dynamic 1 Hit the return key several times to autobaud if autobaud is enabled the port and get the Login prompt 2 Enter your login name The default is InReach 3 Enter your password The default is access Additional Considerations Other considerations include the following Setting up us...

Страница 35: ...ure Trigger Action Configuration Notification Interface Broadcast Group Subscriber SNMP Menu User Superuser Enter enable command and login to Superuser command mode Cconfiguration Nnotification Mmenu Ssnmp Ssubscriber Iinterface Ibroadcast group Modem PPP Ethernet Async Mmodem Pppp Pport ethernet Pport async Oopen Menu Editing User Service Service Profile User Information Protocol Command See Note...

Страница 36: ... of the network Using ppciboot an LX Series unit can be configured to obtain an IP address and other parameter values from the network when the unit boots Autobauding Feature Autobaud is disabled on all ports The administrator can enable autobaud on a per port basis except for the DIAG port port 0 Default settings for the DIAG port port 0 are 9600 8 None 1 Reinitializing Powering Off the Unit To r...

Страница 37: ...monitors when connected to an In Reach Temperature Humidity Sensor The Temperature Humidity Sensor provides an accurate measurement of the temperature humidity in the area in which your LX Series unit is placed The following section explains how to connect and install the sensor Connecting the Temperature Humidity Sensor A 10 foot Male RJ 45 to Male RJ 45 straight through cable P N MX 151 3027 con...

Страница 38: ... Power Strip Management The IR 5150 Series family of products provides easy practical and secure solutions for power distribution power management and load measurement for remote internetworking equipment and branch AC circuits IR 5150 Series products are available in 8 outlet and 16 outlet configurations for 100 120VAC up to 30A and for 230VAC up to 16A Continental Europe An IR 5150 Series offers...

Страница 39: ...each 0 show port async 1 status 3 You can also control and monitor the IR 5150 remotely through the LX CLI Refer to the LX Series Commands Reference Guide for a detailed explanation of the commands used to configure and view your IR 5150 through the CLI interface IR 4800 Power Strip Management The IR 4800 48 VDC Series family of products provides easy practical and secure solutions for power distr...

Страница 40: ...IR 4800 2 Connect the other end to any LX port you have configured as a power management port Figure 12 Connecting the IR 4800 You must change the port s access to power model ir4800 before performing any control and monitoring operations Use the following command in the Async Port Configure Mode to configure asynchronous port 10 as an IR 4800 port Async 1 10 0 access power model ir4800 Once the I...

Страница 41: ...l software commands that could be used to control external equipment or provide a controlling voltage for Alarm Inputs Control Relays True SPDT Single Pole Double Throw Form C Relay contact points available in the MRV Corporation IR 7104 product Alarm Inputs Setup and Usage The LX Series can be configured to provide two Alarm Inputs per port using the DSR and CTS signals These are enabled with the...

Страница 42: ... 2 4V or higher to guarantee a high state LX Series products do not support the use of TXD as the controlling voltage for Alarm Inputs DTR or RTS must be used DTR or RTS can provide the controlling voltage for up to 2 Alarm Inputs each A common Signal Ground is required Twisted pair connections are recommended to reduce sensitivity to noise Note that provisions for handling alarm contact bounce an...

Страница 43: ...nder no circumstances should the device load the LX Series output below 2 5V 7 6mA absolute maximum drive A common Signal Ground is required The MRV Corporation IR 7104 family can provide true Form C SPDT Relay outputs rated to 30VDC 1A per contact if higher capacity and stable contacts are required through restart and power cycles Figure 14 Typical Interface Design for Control Output Signals You ...

Страница 44: ...Alternative Port Capabilities 44 MRV Communications Inc www mrv com 451 0331 ...

Страница 45: ...l Cabling Modular RJ 45 DTE Serial Line Speed LX 8000 Series 134 5 bps to 230 Kbps Number of Serial Ports LX 8020 20 ports LX 8040 40 ports Modem optional V 90 K56flex 56 Kbps LEDs FLT OK RS232 Activity 20 on 20 port 1 40 on 40 port unit Port LEDs 1 10 100 Ethernet RCV 10 100 Ethernet Link 100Mbps speed A Feed OK Fault B Feed OK Fault A Regulated OK Fault B Regulated OK Fault and Temp OK Fault Con...

Страница 46: ...ents AC 100 240 VAC 50 60 Hz 0 5 Amps both LX 8020S and LX 8040S Single AC Supply Unit 24W 83 BTU Dual AC Supply Unit 38W 129 BTU 24V DC 18 36V dual feed 1 Amp both LX 8020S and LX 8040S 21 6W 73 8 BTU 48V DC 36 72V dual feed 0 75 Amp both LX 8020S and LX 8040S 19 5W 66 BTU Minimum Software Requirements LX 8000 Series requires V3 4 2 and ppciboot 3 4 0 or greater Ethernet Interfaces 10 100 TX Auto...

Страница 47: ...emperature Humidity Sensor Table 2 Temperature Humidity Sensor Specifications Item Description Interface Proprietary Maximum Cable Length 50 feet Operating Environment 0 to 70 deg C 32 to 158 deg F 5 to 90 humidity non condensing Dimensions Height 0 8 inches Length 3 15 inches Width 1 57 inches Weight 1 2 oz Accuracy Temp 3 deg C Humidity 5 ...

Страница 48: ...Appendix A Technical Specifications 48 MRV Communications Inc www mrv com 451 0331 ...

Страница 49: ...port port 0 is the console man agement port Autobaud is disabled 9600 8 1 None Quick Start is enabled Access is Local Auto Protocol Detect APD is disabled Flow Control is Xon Xoff All Ports Except Management and Modem Ports default settings Autobaud is disabled 9600 8 1 None Access is Remote APD is disabled Flow Control is Xon Xoff Modem Port default settings Autobaud is disabled Speed is 57600 Ac...

Страница 50: ...is configured at the factory to use a default set of initialization parameters that sets all ports to operate with asynchronous ASCII terminal devices Main Menu Configuration Factory Default Setting Boot from Network yes Save boot image to flash no Boot from flash yes Time Out in seconds 8 IP Configuration Menu Configura tion Factory Default Setting IP Assignment method 1 DHCP IP Assignment method...

Страница 51: ...ic Register 2020 Reading Invalid Pattern Value from Expansion CPLD Diagnostic Register 2021 Reading Invalid Value from CPLD System Fail Status Register 2030 AC FAIL bit is set in the CPLD System Fail Status Register 2031 12VFAIL bit is set in the CPLD System Fail Status Register 2033 12VFAIL bit is set in the CPLD System Fail Status Register 2034 CPLD FAIL bit is set in the CPLD System Fail Status...

Страница 52: ...uadart 2 4220 Quadart Loopback operation timeout for Quadart 3 4230 Quadart Loopback operation timeout for Quadart 4 4240 Quadart Loopback operation timeout for Quadart 5 4250 Quadart Loopback operation timeout for Quadart 6 4260 Quadart Loopback operation timeout for Quadart 7 4270 Quadart Loopback operation timeout for Quadart 8 4280 Quadart Invalid Data Received for Quadart 1 4310 Quadart Inval...

Страница 53: ...his example 1 A POST test failure occurs on an 20 port unit All LEDs flash eight times very quickly then the error code is displayed 2 You record that LED 3 turns on Again all LEDs flash eight times very quickly then the rest of the error code is displayed 3 You record that LEDs 3 and 4 turn on Figure 15 explains how to interpret the sample error code NOTE In hexadecimal 0 indicates the LED is OFF...

Страница 54: ...ror Codes 54 MRV Communications Inc www mrv com 451 0331 Figure 15 POST Test Error Code Sample 1 All flash for 2 seconds 2 High error code 20 Hex 3 Cycle 1 through 8 4 Low error code 30 Hex 5 All extinguished 1 2 3 4 5 6 7 8 ...

Страница 55: ...able for connecting to a DCE Data Communication Equipment device and the correct modular adapter male or female DB 25 connector which is essentially an RJ 45 to DB25 adapter Serial Device Connectors The signal assignments of the 8 pin jacks are shown in Figure 16 Figure 16 Serial Device Connector RJ 45 Signal Assignments Diagnostic Port Connector Port 0 The pinout for the Diagnostic Port connector...

Страница 56: ...ar Adapters MRV provides the following modular adapters for use with LX 8000 Series units Female DB 9 PN MX 350 0308 Female DB 25 PN MX 350 0181 Male DB 25 PN MX 350 0179 supports RING Male DB 25 PN MX 350 0180 supports RTS CTS This section describes the pinouts and wiring of the MRV supplied DB 25 adapter Pin Assignments The following table shows the pinouts for the DB 25 cable Pin Signal 1 Cable...

Страница 57: ...18 shows serial DB 25 pin assignments Figure 18 DB 25 Pins 9 Unused 10 Unused 11 Unused 12 Unused 13 Unused 14 Unused 15 Unused 16 Unused 17 Unused 18 Unused 19 Unused 20 Data Terminal Ready 21 Unused 22 Ring Indicate 23 Unused 24 Unused 25 Unused 14 DB 25 Male DB 25 Female 25 1 13 25 14 13 1 ...

Страница 58: ...ce like a modem LX 8000 Series serial ports can also be set up to support modem control except for the DIAG port port 0 Figure 19 Figure 20 and Figure 21 support modem control as needed Only Figure 20 and Figure 21 support concurrent modem control and RTS CTS flow control between the LX 8000 Serial Port and the attached device The adapter shown in Figure 21 supports modem control NOTE You would us...

Страница 59: ... DB 25 to connect your LX Series unit to a PC Figure 19 Adapter Wiring LX Series to DTE CTS DTR XMT GND RCV DCD DSR RTS Female RJ 45 Connector Female DB 25 Connector DTE Device Pin Signal Adaptor Wiring MX 350 0181 Female RJ 45 to female DB 25 Male RJ 45 Connector Male RJ 45 Connector Crossover Cable MAXserver Connector 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 5 20 2 7 3 8 6...

Страница 60: ...B 25 Connector DTE Device Pin Signal Adaptor Wiring MX 350 0181 Female RJ 45 to female DB 25 Male RJ 45 Connector Male RJ 45 Connector Crossover Cable MAXserver Connector 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 5 20 2 7 3 8 6 4 CTS RING DTR XMT XMTGND RCVGND RCV DSR RTS Male RJ 45 Male RJ 45 Female RJ 45 Female RJ 45 Female DB 25 Crossover Cable MAXserver Connector Modular ...

Страница 61: ...ort the DCD signal MRV 8 Wire Cabling This cabling scheme provides XMT RCV DCD DSR DTR RTS CTS and two signal ground wires This cabling is provided through RJ 45 connectors Using this cabling scheme you can concurrently use modem control and RTS CTS hardware flow control since there are four control signals This scheme is useful with relatively high speed devices complex modem control applications...

Страница 62: ...5 Connector CTS DTR XMT GND RCV DCD RTS Male RJ 45 Connector Male RJ 45 Connector Straight Through Cable Adaptor Wiring MX 350 0180 Female RJ 45 to male DB 25 CTS RING DTR XMT XMTGND RCVGND RCV DCD RTS Modem connector Pin Signal 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 5 20 2 7 3 8 4 Female RJ 45 Connector RTS CTS Modem Connection Communication Server Connector Modular Adapt...

Страница 63: ... 51 ethernet connection 20 F first time quick configuration 25 flow control 58 FLT fault LED 17 front panel LEDs 16 G Graphic User Interface GUI accessing 28 H hardware installation 15 help key 14 I iBoot factory default settings 50 installation hardware 15 installing Java Runtime Environment JRE 29 Installing the LX Series site requirements 45 47 49 internet access IP addresses 36 internet enviro...

Страница 64: ...efaults 22 pinouts DB 25 56 61 RJ 45 61 RJ 45 jacks 55 port status LEDs 17 ports 37 POST test error code sample 53 power cable 20 power on self test POST 22 powering on 22 ppciboot factory default settings 50 prompts 13 Q quick configuration first time 25 R rack mounting the unit 19 RCV LED 19 real time clock battery 46 rear panel connections 18 rear panel LEDs 18 reinitializing powering off the u...

Страница 65: ...451 0331 MRV Communications Inc www mrv com 65 INDEX U Unpacking and inspecting the unit 15 W wiring schemes for RJ 45 58 ...

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