R250D Hardware Installation and Maintenance Guide Issue 01 Date 2016-09-30 HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2016. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
R250D Hardware Installation and Maintenance Guide About This Document About This Document Intended Audience This document describes hardware features of the R250D and provides basic installation methods. This document is intended for: l Network planning engineers l Hardware installation engineers l Commissioning engineers l Onsite maintenance engineers l System maintenance engineers Symbol Conventions The symbols that may be found in this document are defined as follows.
R250D Hardware Installation and Maintenance Guide Symbol About This Document Description Calls attention to important information, best practices and tips. NOTE NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration. Change History Changes between document issues are cumulative. The latest document issue contains all changes made in previous issues.
R250D Hardware Installation and Maintenance Guide Contents Contents About This Document.....................................................................................................................ii 1 Product Overview.......................................................................................................................... 1 1.1 Device Structure............................................................................................................................................
R250D Hardware Installation and Maintenance Guide Contents 5.3 Equipment Grounding Specifications...........................................................................................................................75 5.3.1 General Grounding Specifications.............................................................................................................................75 5.3.2 Grounding Specifications for an Equipment Room.....................................................................
R250D Hardware Installation and Maintenance Guide 1 Product Overview 1 Product Overview About This Chapter The R250D in Huawei Agile Distributed Wi-Fi Solution is applicable to scenarios with highdensity rooms and complex wall structures, such as schools, hotels, hospitals, and office meeting rooms. Huawei R250D uses an 86 mm plate in compliance with international standards and can be easily installed into an 86–type box in a room.
R250D Hardware Installation and Maintenance Guide 1 Product Overview 1.1 Device Structure Figure 1-1 shows the appearance of the R250D. Figure 1-1 Appearance of the R250D 1 2 3 Table 1-1 describes ports on the R250D. Table 1-1 Ports on the R250D No. Name Description 1 Default Reset button: restores factory settings and restarts the device if you hold down the button more than 3 seconds. 2 GE1 10/100/1000M port: connects to the wired Ethernet.
R250D Hardware Installation and Maintenance Guide 1 Product Overview Figure 1-2 Indicator GE1 Indicator NOTE l The indicator is located inside the panel, which turns on after the AP is powered on. l Indicator colors may vary slightly at different temperature. Table 1-2 Indicator description Issue 01 (2016-09-30) Type Color Status Description Default status after power-on Green Steady on The AP is just powered on and the software is not started yet.
R250D Hardware Installation and Maintenance Guide Type Alarm 1 Product Overview Color Green Status Description Blinking once every 5s (0.2 Hz) The system is running properly, the Ethernet connection is normal, and no STA is associated with the AP. The system is in low power consumption state. Blinking once Alarm Green every 0.25s (4 Hz) l The software is being upgraded.
R250D Hardware Installation and Maintenance Guide 1 Product Overview Table 1-3 provides basic specifications of the R250D. Table 1-3 Basic specifications Item Description Physical specifications Dimensions (H x W x D) 26 mm x 86 mm x 120 mm Weight 0.2 kg System memory l 256 MB DDR3L l 32MB Flash Power specifications Environment specifications Power input PoE power supply: in compliance with IEEE 802.3af/at Maximum power consumption 10.
R250D Hardware Installation and Maintenance Guide 2 AP Installation 2 AP Installation About This Chapter 2.1 Preparing for Installation 2.2 Installation Flowchart 2.3 Unpacking the Equipment 2.4 Determining the Installation Position 2.5 Installing the Device 2.6 Cable Connection 2.7 Checking the Device After Installation 2.8 Powering on the Device Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 2 AP Installation 2.1 Preparing for Installation This section describes safety precautions and tool preparations for AP installation. Safety Precautions l Take proper measures to prevent injuries and device damage. l Place the device in a dry and flat position away from any liquid and prevent the device from slipping. l Keep the device clean. l Do not put the device and tools in the aisles.
R250D Hardware Installation and Maintenance Guide 2 AP Installation RJ45 crimping tool Cable cutter Network cable tester Multimeter Ladder Safety helmet Safety belt Anti-skid shoes - 2.2 Installation Flowchart The following figure shows the process. Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 2 AP Installation Figure 2-1 Installation flowchart 2.3 Unpacking the Equipment Before unpacking the carton, ensure that the packing carton is intact and not damaged or soaked. Stop unpacking if the equipment is rusted or soggy. Then, investigate causes and contact the supplier. After unpacking, check items in the carton against the packing list. If any item is missing, contact the supplier or agent. Usually, the packing list contains the following items.
R250D Hardware Installation and Maintenance Guide 2 AP Installation l Install the device in a site that is free from leaking or dripping water, heavy dew, and humidity, and take protective measures to prevent water from flowing into the equipment along the cable. l Place the AP far away from electronic devices that may produce radio interference, such as microwave ovens, antennas, and other radio communication devices. For details, see Table 2-2.
R250D Hardware Installation and Maintenance Guide 2 AP Installation 60mm 2. Use a 6 mm drill bit to drill 25 mm to 30 mm deep holes in the drilling positions. Hammer the expansion tubes into the holes until the expansion tubes are completely embedded into the wall. Ø6 25mm~30mm 3. Connect the cables. For details, see 2.6 Cable Connection. 4. Open the front cover of the device, align screws on both sides with the plastic expansion tubes, and use the Phillips screwdriver to tighten the two screws.
R250D Hardware Installation and Maintenance Guide 2 AP Installation ST3.5 0.3N•m GE1 5. Close the cover. If torx security screws are used to prevent theft, use a T9 torx security screwdriver to tighten the torx security screws into the device. ST2.5 GE1 0.16N•m GE1 NOTE You need to separately prepare the T9 torx security screwdriver. 2.5.2 Installing the Device into an 86-Type Box Installing the device in an 86-type box requires expansion screws delivered with the device.
R250D Hardware Installation and Maintenance Guide 2 AP Installation 2. Connect the network cable to the GE0/PoE_IN interface. 3. Connect the cables. For details, see 2.6 Cable Connection. 4. Open the front cover of the device, align screws on both sides with the screw holes in the 86-type box, and use the Phillips screwdriver to tighten the two screws. M4 1N•m GE1 5. Issue 01 (2016-09-30) Close the cover.
R250D Hardware Installation and Maintenance Guide 2 AP Installation ST2.5 GE1 0.16N•m GE1 NOTE You need to separately prepare the T9 torx security screwdriver. 2.6 Cable Connection Table 2-3 describes the cable connections. Figure 2-2 Appearance of the R250D 1 Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 2 AP Installation Table 2-3 Cable connections No. Cable or Device Description 1 Network cable l CAT5e cables or higher must be used. l The length of a cable cannot exceed 100 m. l The Ethernet cable must work properly; otherwise, the device may fail to be powered on or cannot run properly. Before connecting an Ethernet cable to the R250D, use the cable test tool to check whether the cable is qualified. If not, replace the cable.
R250D Hardware Installation and Maintenance Guide 2 AP Installation No. Check Item 7 Connectors of signal cables are complete, intact, and tightly connected. The signal cables are not damaged or broken. 8 Labels on cables are clear and correct. 2.8 Powering on the Device After the device is powered on, observe indicator on the device to determine the system running status. For details, see 1.2 Indicator Description. NOTE Do not frequently power on and off the device.
R250D Hardware Installation and Maintenance Guide 3 Logging In to the Device 3 Logging In to the Device About This Chapter 3.1 Logging In to the Device Using STelnet/Telnet Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 3 Logging In to the Device 3.1 Logging In to the Device Using STelnet/Telnet You can log in to the device using STelnet V2 or Telnet to configure, manage, and maintain the device in the CLI. NOTE l By default, only the STelnet V2 service is enabled on the device. l Telnet has security vulnerabilities. You are not advised to enable the Telnet service. Before logging in to the device, complete the following tasks: l Power on the device.
R250D Hardware Installation and Maintenance Guide 4 Hardware Failures 4 Hardware Failures About This Chapter This section describes common methods for troubleshooting typical hardware faults. 4.1 An device Fails to Be Powered On Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 4 Hardware Failures 4.1 An device Fails to Be Powered On Fault Description The SYS indicator of a device is off. Possible Causes l The power sourcing equipment does not support the PoE function or is faulty. l The power sourcing equipment is incorrectly configured (the PoE function is disabled or the power-off time range is improperly set). l The line is faulty (the network cable or distribution frame is damaged). l The device is faulty.
R250D Hardware Installation and Maintenance Guide 5 Appendix 5 Appendix About This Chapter 5.1 On-site Cable Assembly and Installation 5.2 Environmental Requirements for Device Operation 5.3 Equipment Grounding Specifications 5.4 Engineering Labels for Cables 5.5 Guide to Using Optical Modules 5.6 Fault Tag 5.7 Installation Checklist Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 5 Appendix 5.1 On-site Cable Assembly and Installation 5.1.1 Cable Assembly Precautions Checking the Appearance of Cables l If the cable jacket or insulation is visibly dirty, clean it before assembly. l If the jacket or insulation of a cable has visible damage, irreparable scuffing, or other defects, do not use the cable. l If the shield layer of a cable is damaged, do not use the cable.
R250D Hardware Installation and Maintenance Guide 5 Appendix – Cut all the exposed copper wires. – Try to avoid a second crimping of sleeves. – Keep all the conductors clean and aligned. NOTE The connectors, cables, and tools provided by different vendors may be different. The figures in this document are for your reference only. 5.1.2 Assembling Power Cables Assembling the OT Terminal and Power Cable Context Figure 5-1 shows the components of an OT terminal and a power cable.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-2 Stripping a power cable (OT terminal) NOTICE l When you strip a power cable, do not damage the conductor of the cable. l If the bare crimping terminal is not provided by Huawei, the value of L1 is 1 mm (0.04 in.) to 2 mm (0.08 in.) greater than the value of L. Table 5-1 Mapping between the cross-sectional area of the conductor and the value of L1 CrossSectional Area of Conductor (mm2(in.2)) Value of L1 (mm(in.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-3 Putting the heat shrink tubing onto the bare crimping terminal Step 3 Put the OT terminal B onto the exposed conductor, and ensure that the OT terminal is in good contact with the insulation coating C, as shown in Figure 5-3. NOTICE After the conductor is fed into the OT terminal, the protruding part of the conductor, or L2 in Figure 5-3, must not be longer than 2 mm (0.08 in.).
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-5 Heating the heat shrink tubing (OT terminal) NOTICE Stop heating the shrink tubing when the connector is securely locked in the shrink tubing. Do not heat the shrink tubing too long as this may damage the insulation coating. ----End Assembling the JG Terminal and Power Cable Context Figure 5-6 shows the components of a JG terminal and a power cable. Figure 5-6 Components of a JG terminal and a power cable A. JG terminal B.
R250D Hardware Installation and Maintenance Guide 5 Appendix Procedure Step 1 Strip a part of the insulation to expose the cable conductor with a length of L, as shown in Figure 5-7. The recommended values of L are listed in Table 5-2. NOTICE l When you strip a power cable, do not damage the conductor of the cable. l If the bare crimping terminal is not provided by Huawei, you can adjust the value of L as required.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-8 Putting the heat shrink tubing onto the bare crimping terminal Step 3 Put the bare crimping terminal onto the exposed conductor, and ensure that the bare crimping terminal is in good contact with the insulation of the power cable, as shown in Figure 5-8. Step 4 Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure 5-9.
R250D Hardware Installation and Maintenance Guide 5 Appendix ----End Assembling the Cord End Terminal and the Power Cable Context Figure 5-11 shows the components of a cord end terminal and a power cable. Figure 5-11 Components of a cord end terminal and a power cable A. Cord end terminal B. Insulation layer of a power cable C. Conductor of a power cable Procedure Step 1 Strip a part of the insulation to expose the cable conductor with a length of L1, as shown in Figure 5-12.
R250D Hardware Installation and Maintenance Guide 5 Appendix Table 5-3 Mapping between the cross-sectional area of the conductor and the value of L1 CrossSectional Area of Conductor (mm2(in.2)) Value of L1 (mm(in.)) Cross-Sectional Area of Conductor (mm2(in.2)) Value of L1 (mm(in.)) 1 (0.002) 8 (0.31) 10 (0.015) 15 (0.59) 1.5 (0.002) 10 (0.39) 16 (0.025) 15 (0.59) 2.5 (0.004) 10 (0.39) 25 (0.039) 18 (0.71) 4 (0.006) 12 (0.47) 35 (0.054) 19 (0.75) 6 (0.009) 14 (0.55) 50 (0.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-14 Crimping the cord end terminal and the conductor Step 4 Check the maximum width of the tubular crimped terminal. The maximum width of a tubular crimped terminal is listed in Table 5-4. Table 5-4 Maximum width of a tubular crimped terminal Cross-Sectional Area of Tubular Terminal (mm2(in.2)) Maximum Width of Crimped Terminal W1 (mm(in.)) 0.25 (0.0004) 1 (0.04) 0.5 (0.0008) 1 (0.04) 1.0 (0.0015) 1.5 (0.06) 1.5 (0.0023) 1.
R250D Hardware Installation and Maintenance Guide 5 Appendix Context Figure 5-15 shows the components of an RJ45 connector and a shielded Ethernet cable. Figure 5-15 Shielded RJ45 connector and cable A. Jacket of connector B. Metal shell of connector E. Jacket of Ethernet cable F. Shield layer of Ethernet cable C. Wire holder of connector D. Plug of connector G. Twisted-pair wires - Procedure Step 1 Fit the jacket of the connector onto the Ethernet cable, as shown in Figure 5-16.
R250D Hardware Installation and Maintenance Guide 5 Appendix NOTICE l When you remove a section of the jacket, do not damage the shield layer of the twistedpair cable. l When you remove the shield layer, do not damage the insulation of the twisted-pair cable. Figure 5-17 Removing the jacket of a twisted-pair cable (unit: mm (in.)) Step 3 Fit the metal shell onto the twisted-pair cable. The shield layer is covered by the metal shell, as shown in Figure 5-18.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-19 Removing the shield layer of a twisted-pair cable (unit: mm (in.)) Step 5 Lead the four pairs of twisted-pair wires through the wire holder, as shown in Figure 5-20 and Figure 5-21. Ensure that the colored wires are in the correct location in the cable.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-22 Four pairs of cables on a wire holder Figure 5-23 Connections between wires and pins White-Orange Orange White-Green Blue White-Blue Green White -Brown Brown Pin 8 Pin 1 Table 5-5 Connections between wires and pins (using a straight-through cable as an example) Issue 01 (2016-09-30) Matching Pins of Wires Wire Color 1 White-Orange 2 Orange 3 White-Green 4 Blue 5 White-Blue 6 Green 7 White-Brown Huawei Proprietary
R250D Hardware Installation and Maintenance Guide 5 Appendix Matching Pins of Wires Wire Color 8 Brown Step 7 Cut off the surplus cables along the lower edge of the wire holder, as shown in Figure 5-24. Figure 5-24 Cutting off surplus cables Step 8 Put the connector body onto the wire holder and turn the metal shell by 90°, as shown in Figure 5-25. NOTE Ensure that the wire holder is in good contact with the connector body.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-26 Crimping the connector Step 10 Push the jacket towards the metal shell until the metal shell is covered. This completes the assembly of one end of the cable, as shown in Figure 5-27. Figure 5-27 Pushing the metal shell Step 11 To complete the assembly of the other end, repeat Step 1 through Step 10.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-28 Components of an unshielded RJ45 connector and cable A B C A. Plug of connector B. Jacket C. Twisted-pair wires Procedure Step 1 Remove a 16-mm (0.63 in.) long section of the jacket, as shown in Figure 5-29. NOTICE When you remove the shield layer, do not damage the insulation of the twisted-pair cable. Figure 5-29 Removing the jacket of a twisted-pair cable (unit: mm (in.
R250D Hardware Installation and Maintenance Guide 5 Appendix Table 5-6 Connections between wires and pins (using a straight-through cable as an example) Matching Pins of Wires Wire Color 1 White-Orange 2 Orange 3 White-Green 4 Blue 5 White-Blue 6 Green 7 White-Brown 8 Brown Step 3 Feed the cable into the plug, and crimp the connector, as shown in Figure 5-31. NOTE When inserting the cable, check from the side or bore of the plug to ensure that the cable is completely seated in the plug.
R250D Hardware Installation and Maintenance Guide 5 Appendix l To ensure conductivity, the surface of the contact strips must be clean. l The contact strips must be in good contact with the RJ45 socket. The plastic separators must remain intact and be aligned. l The contact strip blade must extend beyond the ends of the wires. The ends of the wires must be in contact with the edge of the RJ45. The distance between them must be less than 0.5 mm (0.02 in.).
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-34 Unparallel contact strips of different heights Step 3 Check whether the contact strips are clean. If they are not clean and the dirt cannot be removed, replace it with a new RJ45 connector. Figure 5-35 shows an unqualified piece. Figure 5-35 Dirt on a contract strip Step 4 Check whether the contact strips and the plastic separators are well aligned and intact.
R250D Hardware Installation and Maintenance Guide 5 Appendix of the RJ45, and that the contact strip blade extends beyond the ends of the wires and is crimped with the wires. If not, replace the connector. Figure 5-37 shows an unqualified piece. Figure 5-37 Wires not in good contact with the edge of the RJ45 ----End Testing the Connection of Assembled Cables Context Huawei provides two types of Ethernet cables: straight-through cables and crossover cables.
R250D Hardware Installation and Maintenance Guide 5 Appendix Table 5-8 Connections of core wires in a straight crossover cable RJ45 Connector 1 RJ45 Connector 2 Core Wire Color Twisted or Not 6 2 Orange Twisted 3 1 Orange-White 2 6 Green 1 3 Green-White 4 4 Blue 5 5 Blue-White 8 8 Brown 7 7 Brown-White Twisted Twisted Twisted Figure 5-38 shows the pins of an RJ45 connector.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-39 Testing the conduction and connections of wires Step 3 Gently shake the connector and repeat Step 2 to check whether the metal contact strips are in good contact with the core wires and Ethernet ports, as shown in Figure 5-40.
R250D Hardware Installation and Maintenance Guide 5 Appendix NOTE If a tester is not available, you can use a multimeter to perform a simple test, as shown in Figure 5-41. Figure 5-41 Testing the connection of an Ethernet cable ----End 5.1.4 Installing Cable Accessories Precautions for Installing Cable Accessories Tools NOTE The illustrations in this document may differ from actual situations, but the installation methods are the same.
R250D Hardware Installation and Maintenance Guide 5 Appendix Table 5-9 Bending radius of cables or fibers Cable or Fiber Bending Radius (R) Ordinary cable In normal cases, R ≥ 2d. When the cable is connected with a connector, R ≥ 5d. Fiber R ≥ 40 mm (1.57 in.); Bending angle > 90° NOTE The letter d indicates the diameter of a cable or fiber. Precautions for Installation l Hold terminals of cables instead of pulling the cables themselves when installing or removing cable components.
R250D Hardware Installation and Maintenance Guide 5 Appendix Procedure l Install an OT terminal. a. Align the hole of the OT terminal (conductor upward) with a connecting hole, as shown in Figure 5-42. Figure 5-42 Aligning the OT terminal with a connecting hole NOTE When you install an OT terminal, the crimping sleeve is installed as shown in Figure 5-43, where A is correct and B is incorrect. Figure 5-43 Installing an OT terminal, showing the orientation of crimping sleeve b.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-44 Installing two terminals back to back NOTICE Ensure that the OT terminal is not in contact with other terminals or metal components. c. Move the cable slightly and ensure that it is securely connected, as shown in Figure 5-45. Figure 5-45 Installed OT terminal l Install two OT terminals on a post.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-46 Bending the upper OT terminal at a 45- or 90-degree angle Figure 5-47 Crossing two terminals NOTICE If the two terminals are different sizes, place the smaller one above the bigger one. A maximum of two terminals can be installed on a post. l To remove an OT terminal, loosen the screw counterclockwise.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-48 Placing a terminal on a terminal jack vertically Step 2 Insert the terminal into the jack vertically, and turn the screw clockwise to fasten the terminal, as shown in Figure 5-49. Figure 5-49 Feeding the terminal into the jack NOTICE l Ensure that the exposed section of the terminal is less than 2 mm (0.079 in.) in length. l Do not press the insulation of the terminal. l Insert only one terminal into one jack.
R250D Hardware Installation and Maintenance Guide 5 Appendix Installing a Shielded Ethernet Connector Procedure Step 1 Hold the male and female connectors, with the male connector facing the female connector, as shown in Figure 5-50. Figure 5-50 Holding the male and female shielded connectors Step 2 Insert the male connector into the female connector, as shown in Figure 5-51.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-52 Installed shielded Ethernet connector Step 4 To remove an Ethernet connector, press the locking key and pull out the connector, as shown in Figure 5-53. Figure 5-53 Removing a shielded Ethernet connector ----End Installing an Unshielded Ethernet Connector Procedure Step 1 Hold the male and female connectors, with the male connector facing the female connector, as shown in Figure 5-54.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-54 Holding the male and female unshielded connectors Step 2 Feed the male connector into the female connector, as shown in Figure 5-55. Figure 5-55 Feeding the male connector into the female unshielded connector Step 3 A crisp click indicates that the connector is locked by the locking key. Pull the connector slightly and ensure that it is securely connected. Figure 5-56 shows an installed Ethernet connector.
R250D Hardware Installation and Maintenance Guide 5 Appendix Step 4 To remove an Ethernet connector, press the locking key and pull out the connector, as shown in Figure 5-57. Figure 5-57 Removing an unshielded Ethernet connector ----End Installing Fiber Connectors Context NOTICE l After you remove the dustproof cap, ensure that the fiber pins are clean and install them as soon as possible. l When you disassemble fiber connectors, you must use a dedicated tool if the connectors are densely installed.
R250D Hardware Installation and Maintenance Guide 5 Appendix Procedure Step 1 Remove the dustproof cap of the FC connector and store it for future use. Step 2 Align the core pin of the male connector with that of the female connector, as shown in Figure 5-58. Figure 5-58 Aligning the male connector with the female connector Step 3 Align the male connector with the female connector and gently push the male connector until it is completely seated in the female connector, as shown in Figure 5-59.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-60 Fastening the locking nut Step 5 To disassemble an FC fiber connector, loosen the locking nut counterclockwise, and gently pull the male connector, as shown in Figure 5-61. Figure 5-61 Disassembling an FC fiber connector ----End Installing an LC Fiber Connector Procedure Step 1 Remove the dustproof cap of the LC fiber connector and store it for future use.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-62 Aligning the male connector with the female connector Step 3 Align the male connector with the fiber adapter and gently push the male connector until it is completely seated in the fiber connector, as shown in Figure 5-63. Figure 5-63 Feeding the male connector into the female connector Step 4 A clicking sound indicates that the male connector is locked, as shown in Figure 5-64.
R250D Hardware Installation and Maintenance Guide 5 Appendix Step 5 To disassemble an LC fiber connector, press the locking nut to release the locking clips from the bore, and gently pull the male connector, as shown in Figure 5-65. Figure 5-65 Disassembling an LC fiber connector ----End Installing the SC Fiber Connector Procedure Step 1 Remove the dustproof cap of the SC fiber connector and store it for future use.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-67 Installed SC fiber connector Step 4 To disassemble an SC fiber connector, hold the shell of the connector (do not hold the fiber) and gently pull the connector in the direction vertical to the adapter. Unlock the male connector, and then separate it from the shell, as shown in Figure 5-68.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-69 Aligning the male connector with the female connector Step 3 Hold the shell labeled "PUSH" and feed the male connector into the female connector until you hear a clicking sound. The male and female connectors are securely installed, as shown in Figure 5-70. Figure 5-70 Installed MPO fiber connector Step 4 To disassemble an MPO fiber connector, hold the shell labeled "PULL" and remove the male connector, as shown in Figure 5-71.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-71 Disassembling an MPO fiber connector ----End 5.1.5 Replacing the Mold of the Crimping Tool Procedure Step 1 Hold the handles of a pair of COAX crimping tools. Loosen the two fastening screws counterclockwise, as shown in Figure 5-72. Figure 5-72 Loosening two fastening screws Step 2 Hold the handles of the COAX crimping tools to open the self-locking mechanism.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-73 Pliers jaw opening automatically Step 3 Remove the mold from the COAX crimping tools, as shown in Figure 5-74. Figure 5-74 Removing the mold from the COAX crimping tools Step 4 Place the mold to be installed into the jaw of the COAX crimping tools and align the screw holes, as shown in Figure 5-75. Issue 01 (2016-09-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-75 Installing a new mold in the COAX crimping tool NOTICE Keep the short side of the mold inwards and the long side outwards, with the teeth of the mold aligning from the larger size to the smaller size. Step 5 Hold the handles of the COAX crimping tools tightly to match the mold and the jaw completely. Align the screw holes, as shown in Figure 5-76.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-77 Mold installed in the COAX crimping tool Figure 5-78 An installed mold ----End 5.2 Environmental Requirements for Device Operation 5.2.1 Environmental Requirements for an Equipment Room Requirements for Selecting a Site for an Equipment Room When designing a project, consider the communication network planning and technical requirements of the equipment.
R250D Hardware Installation and Maintenance Guide 5 Appendix The equipment room should be located in a place free from high temperature, dust, toxic gases, explosive materials, or unstable voltage. Keep the equipment room away from significant vibrations or loud noises, as well as power transformer stations. The specific requirements for selecting a site for an equipment room are as follows: l The room should be located at a distance of at least 5 km (3.11 mi.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-79 Layout of the equipment room Transmission room Control room Generator room Main communication equipment room Power distribution room Battery room Substation room Communication cable and optical cable Power cable The general layout principles of the equipment room are as follows: l It should meet requirements for laying out and maintaining communication cables and power cables.
R250D Hardware Installation and Maintenance Guide 5 Appendix Item Requirements Door and windows The door of the equipment room should be 2 m (6.56 ft) high and 1 m (3.28 ft) wide. One door is enough. Seal the doors and windows with dustproof plastic tape. Use double-pane glass in the windows and seal them tightly. Wall surface treatment Paste wallpaper on the wall or apply flat paint. Do not use pulverized paint. Cable trays Use cable trays to arrange cables.
R250D Hardware Installation and Maintenance Guide 5 Appendix The equipment room must be free from explosive, conductive, magnetically-permeable, and corrosive dust. Table 5-11 lists the requirement for dust concentration in the equipment room. Table 5-11 Requirements for dust particles in the equipment room Mechanical active material Unit Concentration Dust particle Particle /m3 ≤ 3x 104 (no visible dust accumulated on a workbench in three days) Suspending dust mg/m3 ≤0.
R250D Hardware Installation and Maintenance Guide 5 Appendix l Avoid constructing the room near a place where the corrosive gas concentration is high, such as a chemical plant. l Ensure the air intake vent of the room is in the prevailing upwind direction from any pollution source. l Place batteries in different rooms. l A professional service should monitor the corrosive gas conditions regularly. Requirements for ESD Prevention The absolute value of electrostatic voltage must be less than 1000 V.
R250D Hardware Installation and Maintenance Guide 5 Appendix Item Requirements Power cables leading in the equipment room need to be equipped with a surge protector l After the low-voltage power cables are led into the room, install the surge protector for the power cables in the AC voltage stabilizer and the AC power distribution panel (box). Correctly ground the surge protector nearby.
R250D Hardware Installation and Maintenance Guide 5 Appendix Item Requirements Routing of signal cable l Do not arrange the signal cables overhead in the equipment room. All signal cables must be led into the site underground. l Use the cables with a metal jacket or place them into a metal pipe if they come out/in the equipment room. l Ground the idle lines inside the cable in the equipment room. l Signal cables should be deployed on internal walls. Do not deploy outdoor aerial cables.
R250D Hardware Installation and Maintenance Guide 5 Appendix Item Requirements Grounding of the cabinet l All the devices including the surge protection device in the cabinet must be connected in an equipotential manner. The ground cables can be aggregated to the ground bar or surge protector socket first, and then the ground bar or surge protector socket can be connected to the ground. l The resistance between the device ground terminals and ground bar cannot exceed 0.1 ohm.
R250D Hardware Installation and Maintenance Guide 5 Appendix protect independent devices. Configure the current-carrying capacity of the protection switch of the equipment room for more than that of the devices. Table 5-14 lists the voltage range of the AC power supply for the devices.
R250D Hardware Installation and Maintenance Guide 5 Appendix Requirements for DC Power Supply The equipment room should receive stable and reliable DC power. Deploy the power equipment near the telecommunications equipment to make the DC feeder as short as possible. To reduce power consumption and installation cost, the loop voltage drop from the battery port to the equipment port should be less than 3.2 V.
R250D Hardware Installation and Maintenance Guide 5 Appendix l The total capacity of the high-frequency switching rectifier must satisfy the power of the communication loading and battery charging. If there are 10 or fewer active rectifier modules, configure one backup module. If there are more than 10 active modules, configure one backup module for every 10 active modules. l Install storage batteries in two or more groups.
R250D Hardware Installation and Maintenance Guide 5 Appendix Table 5-17 Equipment Grounding Specifications No. Description 1 All communication devices and auxiliary devices (such as mobile base stations, transmission and switching devices, power supply devices) in the equipment room should be grounded for protection.
R250D Hardware Installation and Maintenance Guide 5 Appendix No. Description 3 Use a surge protection circuit on the AC power interface. 4 The positive of the -48 V DC power supply or negative pole of the 24 V DC power supply should be grounded at the output of the DC power supply. 5 The working ground and protective ground of the DC power supply equipment should use the same grounding conductor with the protective ground of the switching equipment.
R250D Hardware Installation and Maintenance Guide 5 Appendix No. Description 2 Bury ground underground or arrange them indoors. Do not route ground cables overhead. 3 Do not connect two cables together to extend the PGND cable, or add any switches or fuses. 4 The PGND cable should be an alternating yellow and green plastic insulated one with a copper core.
R250D Hardware Installation and Maintenance Guide 5 Appendix Type and Structure Label for Signal Cables The label for signal cables is L-shaped with fixed dimensions, as shown in Figure 5-81. Figure 5-81 Label for signal cables To specify more clearly the position of a cable, use the dividing lines on the label. For example, there is a dividing line between the cabinet number and the chassis number, and another one between the chassis number and the slot number.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-82 Power cable label Label Printing The contents can be printed or written on the labels. Printing is recommended for the sake of high efficiency and eye-pleasant layout. Template for Printing You can obtain a template from the Huawei local office to print labels. The template is made in Microsoft Word. Follow these instructions to use the template: l Issue 01 (2016-09-30) You can modify the contents of the template.
R250D Hardware Installation and Maintenance Guide l 5 Appendix If many characters need to be filled in, decrease the font size, but make sure that the printouts are clear and legible. Merging Cells in the Template To merge two or more cells, do as follows: 1. Select Edit/Select All. 2. Select Format/Borders and Shading/Borders. Select Box tab and click OK. 3. Drag the mouse to select cells to be merged and select the Table/Merge Cells.
R250D Hardware Installation and Maintenance Guide 5 Appendix Requirements for Feeding the Printer The label paper consists of two layers and has undergone multiple processing procedures such as printing and cutting. No matter what model of printer you use, feed in the labels one page at a time. To avoid jamming the labels, never use the auto-feed mode. Feed in the label paper in the correct direction to ensure that the text is printed in a correct position.
R250D Hardware Installation and Maintenance Guide 5 Appendix Placement of text on a label is shown in Figure 5-84. Figure 5-84 Placement of text on a label Attaching Labels After printing or writing the label, remove the label from the page and attach it to the signal cable, or the identification plate of the power cable. The methods for attaching labels are described in the following sections. Label for Signal Cables l Choose the place to attach labels. The label is attached 2 cm (0.79 in.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-86 Label for signal cables Power Cable Label Remove the label from the backing page, and attach it to the identification plate on the cable tie. The label should be attached to the rectangular flute on the identification plate, and attached to only one side of the identification plate. The cable ties are bundled at 2 cm (0.79 in.) from the connectors, and other positions are allowed in special circumstances.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-87 Binding the label for the power cable Cable TO: B03 TO: B03 -48V2 -48V2 Cable The identification card is on the top of the cable in horizontal cabling. The identification card is to the right of the cable in vertical cabling. Contents of Engineering Labels Contents of Labels for Power Cables Labels for power cables are affixed on only one side of the identification plates.
R250D Hardware Installation and Maintenance Guide 5 Appendix In other words, the information in Area 1 at one end is the same as the information in Area 2 at the other end of the cable. Precautions for Using Engineering Labels When using labels, pay attention to the following points: l When printing, writing, or attaching labels, keep the labels clean. l Since the label paper is made of moistureproof material, ink-jet printers and ink pens cannot be used to print and write labels.
R250D Hardware Installation and Maintenance Guide Content 5 Appendix Meaning Example D: optical interface number. Numbered in top-down and left-right order, consistent with the port sequence number on the device. R: Receiving interface - T: optical transmitting interface Example of the Label Figure 5-89 shows a sample label on an optical fiber.
R250D Hardware Installation and Maintenance Guide Content 5 Appendix Meaning Example C: physical slot number Numbered in top-down and left-right order starting from 01. For example, 01 is the first slot at the top left of the chassis. D: optical interface number. Numbered in top-down and left-right order, consistent with the port sequence number on the device.
R250D Hardware Installation and Maintenance Guide 5 Appendix Meaning of the label in Figure 5-90 l "ODF-G01-01-01-R" indicates that the local end of the optical fiber is connected to the optical receiving terminal in row 01, column 01 of the ODF in row G, column 01 in the machine room. l "A01-01-05-01-R" indicates that the opposite end of the optical fiber is connected to optical receiving interface 1 in slot 05, chassis 01 in the cabinet in row A, column 01 in the machine room. 5.4.
R250D Hardware Installation and Maintenance Guide 5 Appendix l For a network cable connecting a hub and device, the label on the hub end should indicate the numbers of the chassis and cabinet where the hub resides, and the serial number on the hub. The label on the device end should indicate the number of the chassis and cabinet where the device is located. If the device is a standalone device, provide the specific position of the device.
R250D Hardware Installation and Maintenance Guide Content MDF-MN-B-C 5 Appendix Meaning Example B: frame number Numbered in the bottom-up order with two digits, for example, 03. C: physical slot number Numbered with two digits in top-down and leftright order. For example, 01. D: cable number Numbered with two digits in top-down and leftright order. For example, 01. MN: row number and column number of the MDF M: The rows of cabinets from front to back are numbered from A to Z.
R250D Hardware Installation and Maintenance Guide 5 Appendix Engineering Labels for DC Power Cables These labels are affixed to the DC power cables that provide power supply for cabinets, including the -48 V, PGND, and BGND cables. Here, the DC power cables also include power cables and PGND cables. The labels for DC power cables are affixed to one side of the identification plates on cable ties. For details of the labels, see Table 5-26.
R250D Hardware Installation and Maintenance Guide 5 Appendix The meaning of the label in Figure 5-93 is as follows: l On the loaded cabinet side, the label "A01/B08--48V2" on the cable indicates that the cable is -48 V DC supply, which is from the eighth connector in row B of -48 V bus bar in the cabinet in row A, and column 1 in the equipment room.
R250D Hardware Installation and Maintenance Guide 5 Appendix Make sure that labels are affixed in the correct direction. That is, after the cable ties are bundled onto the cable, the identification plates with the labels should face up, and the text on the labels in the same cabinet should be in the same direction, as shown in Figure 5-94.
R250D Hardware Installation and Maintenance Guide 5 Appendix The preceding faults lead to temporary or long-term cut-off of optical signals; or even cause permanent damages to the optical module, affecting communication services. Measures to Prevent a Loosened Optical Module 1. When installing an optical module, insert it in position. If you hear a click or feel a slight shake, it indicates that the latch boss is secured.
R250D Hardware Installation and Maintenance Guide 5 Appendix NOTE Place at least three cleaning tissues on the work bench. As shown in Figure 5-96, wipe the end of an optical connector from left to right or from right to left on a cleaning tissue, and then move the connector end to the unused part of the cleaning tissue to continue. 2. Cover an unused optical module with a protective cap to prevent dust, as shown in Figure 5-97.
R250D Hardware Installation and Maintenance Guide 5 Appendix Figure 5-100 Cleaning a receptacle with a cotton swab NOTICE When cleaning a receptacle, insert the cotton swab and turn it slowly in the receptacle. Do not use too much strength because the receptacle may be damaged. 5. If optical signals are lost during the operation of a device, use the preceding method to clean the receptacle or the optical connector. In this manner, the possibility of contamination can be excluded.
R250D Hardware Installation and Maintenance Guide 5 Appendix Category*: □ RMA □ Return □ Analysis BOM Code Product Description Bar Code* Fault Occurring Date* Description of the Fault Phenomena* Category No.* Software Version* Reasons for Repairing (Category No.): Category No.
R250D Hardware Installation and Maintenance Guide Com pone nt PoE power supply Issue 01 (2016-09-30) 5 Appendix Applic able Scope Check Item 2 Indepen dent AC The power modules are securely installed with their captive screws tightly fixed. 3 Indepen dent AC Four rubber pads are attached to specified positions on the bottom of the AC before it is placed on a desk.
R250D Hardware Installation and Maintenance Guide Com pone nt Applic able Scope Check Item 1 General The AP installation positions comply with the network planning report and APs cannot be installed in environments with strong electrical or magnetic interference or corrosive materials. If the onsite environment does not meet requirements, adjust the AP installation positions properly. 2 General The devices are installed correctly, securely, without damages or paint peeling. Screws are tightened.
R250D Hardware Installation and Maintenance Guide Com pone nt Signal cable No. Check Item 10 Indoor AP Indoor APs should be mounted on walls with network ports downwards to prevent device damages caused by water drops or other liquid. Install the device in a site that is free from leaking or dripping water, heavy dew, and humidity, and take protective measures to prevent water from flowing into the equipment along the cable.
R250D Hardware Installation and Maintenance Guide Com pone nt 5 Appendix Applic able Scope Check Item General Signal cables are orderly routed and not crossed, twisted, or winded (cables can be crossed at 1 m out of the cabinet). The bend radius of cables meets requirements, and the cables are not excessively bent. 5 General Signal cables are not damaged or broken and have no splices. Sufficient cable length is reserved.
R250D Hardware Installation and Maintenance Guide Com pone nt No. Applic able Scope Check Item 11 General The feeder cable connectors comply with corresponding standards and are correctly connected, without looseness. 12 General The feeder cables, power splitter, coupler, and surge protective devices are connected correctly and reliably in accordance with specifications. General Strong current and weak current cables are routed separately.
R250D Hardware Installation and Maintenance Guide Com pone nt Anten na 5 Appendix No. Applic able Scope Check Item 1 General The installation positions of antennas should comply with the engineering design and antennas should be securely and reliably installed. 2 General There should be no obstacles in the major coverage direction of antennas. The direction and downlink tilt of antennas should be adjusted based on the coverage targets.
R250D Hardware Installation and Maintenance Guide Com pone nt No. 10 Applic able Scope Outdoor antenna 5 Appendix Check Item If multiple APs are mounted to different poles, the APs should provide signal coverage in the same direction or in back-to-back mode to ensure that main lobe of antennas on different APs do not face each other.
R250D Hardware Installation and Maintenance Guide Com pone nt No. Applic able Scope Check Item 2 General The labels of pluggable optical modules are smoothly attached and intact, and cannot be covered by the optical modules. General If a short-distance optical fiber is used for a long-distance optical module, especially in loopback scenarios, use an optical attenuator to prevent the optical module from being burnt.
