Huawei R250D Users Guide

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.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address:	Huawei Industrial Base
	Bantian, Longgang
	Shenzhen 518129
	People's Republic of China
Website:	http://www.huawei.com
Email:	[e-mail]

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R250D	About This Document
Hardware Installation and Maintenance Guide

About This Document

Intended Audience

This document describes hardware features of the R250D and provides basic installation methods.

This document is intended for:

•Network planning engineers

•Hardware installation engineers

•Commissioning engineers

•Onsite maintenance engineers

•System maintenance engineers

Symbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol			Description
			Indicates an imminently hazardous situation
			which, if not avoided, will result in death or
			serious injury.
			Indicates a potentially hazardous situation
			which, if not avoided, could result in death
			or serious injury.
			Indicates a potentially hazardous situation
			which, if not avoided, may result in minor
			or moderate injury.
			Indicates a potentially hazardous situation
			which, if not avoided, could result in
			equipment damage, data loss, performance
			deterioration, or unanticipated results.
			NOTICE is used to address practices not
			related to personal injury.

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R250D		About This Document
Hardware Installation and Maintenance Guide
	Symbol	Description
	NOTE	Calls attention to important information,
		best practices and tips.
		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.

Issue 01 (2016-09-30)

Initial commercial release

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R250D
Hardware Installation and Maintenance Guide	Contents

Contents

About This Document.....................................................................................................................			ii
1 Product Overview..........................................................................................................................			1
1.1	Device Structure.............................................................................................................................................................		2
1.2	Indicator Description......................................................................................................................................................		2
1.3	Basic Specifications........................................................................................................................................................		4
1.4	Ordering Information......................................................................................................................................................		5
2 AP Installation...............................................................................................................................			6
2.1	Preparing for Installation................................................................................................................................................		7
2.2	Installation Flowchart.....................................................................................................................................................		8
2.3	Unpacking the Equipment..............................................................................................................................................		9
2.4	Determining the Installation Position.............................................................................................................................		9
2.5	Installing the Device.....................................................................................................................................................		10
2.5.1 Installing the Device on a Wall or Ceiling.................................................................................................................			10
2.5.2 Installing the Device into an 86-Type Box................................................................................................................			12
2.6	Cable Connection.........................................................................................................................................................		14
2.7	Checking the Device After Installation........................................................................................................................		15
2.8	Powering on the Device................................................................................................................................................		16
3 Logging In to the Device............................................................................................................			17
3.1	Logging In to the Device Using STelnet/Telnet...........................................................................................................		18
4 Hardware Failures.......................................................................................................................			19
4.1	An device Fails to Be Powered On...............................................................................................................................		20
5 Appendix.......................................................................................................................................			21
5.1	On-site Cable Assembly and Installation.....................................................................................................................		22
5.1.1 Cable Assembly Precautions.....................................................................................................................................			22
5.1.2 Assembling Power Cables.........................................................................................................................................			23
5.1.3 Assembling Ethernet Cables......................................................................................................................................			31
5.1.4 Installing Cable Accessories......................................................................................................................................			45
5.1.5 Replacing the Mold of the Crimping Tool.................................................................................................................			61
5.2	Environmental Requirements for Device Operation....................................................................................................		64
5.2.1 Environmental Requirements for an Equipment Room............................................................................................			64
5.2.2 Requirements for Power Supply................................................................................................................................			72
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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..................................................................................................		75
5.3.3 Grounding Specifications for Devices.......................................................................................................................		75
5.3.4 Grounding Specifications for Communications Power Supply.................................................................................		76
5.3.5 Grounding Specifications for Signal Cables.............................................................................................................		77
5.3.6 Specifications for Laying Out Grounding Cables.....................................................................................................		77
5.4	Engineering Labels for Cables.....................................................................................................................................	78
5.4.1 Introduction to Labels................................................................................................................................................		78
5.4.2 Engineering Labels for Optical Fibers.......................................................................................................................		86
5.4.3 Engineering Labels for Network Cables...................................................................................................................		89
5.4.4 Engineering Labels for User Cables..........................................................................................................................		90
5.4.5 Engineering Labels for Power Cables.......................................................................................................................		91
5.5	Guide to Using Optical Modules..................................................................................................................................	94
5.6	Fault Tag.......................................................................................................................................................................	97
5.7	Installation Checklist....................................................................................................................................................	98

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R250D	1 Product Overview
Hardware Installation and Maintenance Guide

1Product 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. It is equipped with a built-in antenna and a hidden indicator; therefore, installation of the R250D does not affect indoor decorations or designs. It also has an IEEE 802.11a/b/g/n/ac/ac Wave 2 wireless module and can work on both 5 GHz and 2.4 GHz frequency bands. It supports PoE power supply, and can be directly connected to a central AP and deployed in a room. The central AP and the R250D are connected through network cables, which greatly extends the coverage range, enhances flexibility in AP deployment and planning, and reduces the engineering construction costs.

1.1Device Structure

1.2Indicator Description

1.3Basic Specifications

1.4Ordering Information

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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.
3	GE0/	10/100/1000M port: connect to the central AP and supports PoE
	PoE_IN	power input.

1.2 Indicator Description

The R250D provides only one indicator, as shown in Figure 1-2.

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Figure 1-2 Indicator

GE1

Indicator

NOTE

•The indicator is located inside the panel, which turns on after the AP is powered on.

•Indicator colors may vary slightly at different temperature.

Table 1-2 Indicator description

Type	Color	Status	Description
Default status after	Green	Steady on	The AP is just
power-on			powered on and the
			software is not
			started yet.
Software startup	Green	Steady on after	After the system is
status		blinking once	reset and starts
			uploading the
			software, the
			indicator blinks
			green once. Until the
			software is uploaded
			and started, the
			indicator remains
			steady green.
Running status	Green	Blinking once every	The system is
		2s (0.5 Hz)	running properly, the
			Ethernet connection
			is normal, and STAs
			are associated with
			the AP.

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	Type		Color	Status	Description
				Blinking once every	The system is
				5s (0.2 Hz)	running properly, the
					Ethernet connection
					is normal, and no
					STA is associated
					with the AP. The
					system is in low
					power consumption
					state.
	Alarm		Green	Blinking once	• The software is
				Alarm Green every	being upgraded.
				0.25s (4 Hz)	• After the
					software is
					uploaded and
					started, the AP
					working in Fit
					AP mode
					requests to go
					online on the AC
					and maintains
					this state until it
					goes online
					successfully on
					the AC (before
					the CAPWAP
					link is
					established).
					• The AP
					registration fails
					(the CAPWAP
					link is
					disconnected).
	Fault		Red	Steady on	A fault that affects
					services has
					occurred, such as a
					DRAM detection
					failure or system
					software loading
					failure. The fault
					cannot be
					automatically
					rectified and must be
					rectified manually.

1.3 Basic Specifications

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Table 1-3 provides basic specifications of the R250D.

Table 1-3 Basic specifications

Item		Description
Physical	Dimensions (H x	26 mm x 86 mm x 120 mm
specifications	W x D)
	Weight	0.2 kg
	System memory	• 256 MB DDR3L
		• 32MB Flash
Power	Power input	PoE power supply: in compliance with IEEE
specifications		802.3af/at
	Maximum power	10.1 W
	consumption	NOTE
		The actual maximum power consumption depends on local
		laws and regulations.
Environment	Operating	• -60 m to +1800 m: 0°C to +40°C
specifications	temperature	• 1800 m to 5000 m: Temperature decreases by 1°C
		every time the altitude increases 300 m.
	Storage	-40°C to +70°C
	temperature
	Operating	5% to 95% (non-condensing)
	humidity
	IP rating	IP20
	Atmospheric	53 kPa to 106 kPa
	pressure

1.4 Ordering Information

To place an order, contact technical support personnel.

Part Number	Description
50082920	R250D Mainframe(11ac,2x2 Double
	Frequency,Built-in Antenna)

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R250D	2 AP Installation
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2AP Installation

About This Chapter

2.1Preparing for Installation

2.2Installation Flowchart

2.3Unpacking the Equipment

2.4Determining the Installation Position

2.5Installing the Device

2.6Cable Connection

2.7Checking the Device After Installation

2.8Powering on the Device

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2.1 Preparing for Installation

This section describes safety precautions and tool preparations for AP installation.

Safety Precautions

•Take proper measures to prevent injuries and device damage.

•Place the device in a dry and flat position away from any liquid and prevent the device from slipping.

•Keep the device clean.

•Do not put the device and tools in the aisles.

CAUTION

Only the qualified personnel are permitted to install and remove the device and its accessories. Before installation and operation, read the safety precautions carefully.

Tool Preparation

To install APs, prepare tools listed in Table 2-1.

Table 2-1 Tools

Phillips screwdriver	Protective gloves	ESD gloves
Slip-proof glove	Marker	Hammer drill
Claw hammer	Diagonal pliers	Wire stripper

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	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.

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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.

•Remote Unit

•Expansion screws

•Screw

•Quick start guide

•Warranty card

•MAC address label

•SN label

2.4Determining the Installation Position

•Do not deploy the device in places with high temperature, dust, noxious gas, unstable voltage, much vibrations, or strong noise, or in places near flammable or explosive materials and interference sources such as a large radar station, radio station, and transformer station.

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R250D	2 AP Installation
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•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.

•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.

•Install the device in hidden places and ensure that the device does not disturb daily work and life of residents.

•Make the engineering design by fully considering such factors as hydrology, geology, earthquake, electric power, and traffic. The selected site should comply with the environment design specifications of communications equipment.

Table 2-2 General anti-interference requirements

Scenario	Deployment Distance Requirement
Indoor	• There should be at least a 7 m distance between antennas.
installation	• The antennas should be placed at least 2 m from the 4G antennas of
	the carrier.
	• The antennas should be placed far away from electronic devices that
	may produce interference, such as microwave ovens.

NOTE

If antennas are embedded into APs, the deployment distance requirements on the antennas are those on APs.

2.5 Installing the Device

NOTE

Remove the protective film on the surface before installation to prevent electrostatic discharge.

2.5.1 Installing the Device on a Wall or Ceiling

Installing the device on a wall or ceiling requires expansion screws. The procedures are as follows:

1.Determine the installation area on the wall or ceiling and use a marker to mark the drilling positions (the distance between the two drilling positions should be 60 mm).

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R250D	2 AP Installation
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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.

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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

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. The procedure is as follows:

1.Use a screwdriver to remove the 86-type panel from the wall (skip this step if no 86-type panel is installed on the wall).

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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.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.

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ST2.5

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

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R250D			2 AP Installation
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	Table 2-3 Cable connections
	No.	Cable or	Description
		Device
	1	Network	• CAT5e cables or higher must be used.
		cable	• The length of a cable cannot exceed 100 m.
			• 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.
			NOTICE
			Do not insert a PoE input cable into the GE1 port.

Pay attention to the following points when bundling the cables:

•Different types of cables must be separately routed with the minimum spacing of 30 mm and cannot be entangled or crossed. Cables should be parallel or separated using dedicated separators.

•Bundled cables are closely arranged, straight, tidy, and undamaged.

•Cable ties are bound neatly facing the same direction, and those at the same horizontal line must be in a straight line. Cable tie tails should be cut smoothly and evenly.

•Labels or nameplates must be attached to the cables after they are installed.

2.7Checking the Device After Installation

Table 2-4 shows the items to be checked after installation is complete. For more details, see

Installation Checklist in the appendix.

Table 2-4 Installation checklist

No.	Check Item
1	The device is installed by strictly following the design draft. The
	installation position meets space requirements, with maintenance space
	reserved.
2	The device is securely installed.
3	The power cables are intact and not spliced.
4	Terminals of the power cables are welded or cramped firmly.
5	All power cables are not short-circuited or reversely connected and must
	be intact with no damage.
6	The power cables and ground cables are separated from other cables and
	bundled separately.

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	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.

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R250D	3 Logging In to the Device
Hardware Installation and Maintenance Guide

3Logging In to the Device

About This Chapter

3.1 Logging In to the Device Using STelnet/Telnet

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R250D	3 Logging In to the Device
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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

•By default, only the STelnet V2 service is enabled on the device.

•Telnet has security vulnerabilities. You are not advised to enable the Telnet service.

Before logging in to the device, complete the following tasks:

•Power on the device.

•Prepare network cables used to connect device interfaces.

The following table lists the default configuration of the device. You are advised to change the default user name and password on your first login.

Table 3-1 Default configuration of the device

Parameter	Default Setting
User name	admin
Password	[e-mail]
IP address	169.254.1.1
Subnet mask	255.255.0.0

NOTE

If the device is already online on the AC, you can remotely log in to the AC on a local terminal and run the display ap all command to check the IP address of the device.

The following example uses the default parameters and is used for reference only.

Step 1 Use network cables and a LAN switch to connect the PC to the network interface of the device.

Step 2 Assign the PC with an IP address on the same network segment as the default IP address of the device so that the PC and device are reachable to each other.

If the device uses the default settings, the IP address of the PC must be in the network segment 169.254.0.0/16 but cannot be 169.254.1.1. 169.254.1.100 is recommended.

Step 3 Start the CLI on the PC and access the IP address 169.254.1.1 of the device using STelnet V2.

Step 4 Enter the user name and password as prompted to log in to the user interface.

----End

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R250D	4 Hardware Failures
Hardware Installation and Maintenance Guide

4Hardware Failures

About This Chapter

This section describes common methods for troubleshooting typical hardware faults.

4.1 An device Fails to Be Powered On

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4.1 An device Fails to Be Powered On

Fault Description

The SYS indicator of a device is off.

Possible Causes

•The power sourcing equipment does not support the PoE function or is faulty.

•The power sourcing equipment is incorrectly configured (the PoE function is disabled or the power-off time range is improperly set).

•The line is faulty (the network cable or distribution frame is damaged).

•The device is faulty.

Troubleshooting Procedure

1.Check whether the power sourcing equipment supports PoE or is faulty.

2.Check whether the configuration on the power sourcing equipment causes PoE power supply errors, such as the PoE function is disabled or the power-off time range is incorrectly set.

3.Check whether the network cable or distribution frame is faulty.

4.If the device still cannot be powered on, the device itself is faulty. Contact technical support personnel or Huawei agent and ask them to replace the device.

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R250D	5 Appendix
Hardware Installation and Maintenance Guide

5Appendix

About This Chapter

5.1On-site Cable Assembly and Installation

5.2Environmental Requirements for Device Operation

5.3Equipment Grounding Specifications

5.4Engineering Labels for Cables

5.5Guide to Using Optical Modules

5.6Fault Tag

5.7Installation Checklist

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5.1On-site Cable Assembly and Installation

5.1.1Cable Assembly Precautions

Checking the Appearance of Cables

•If the cable jacket or insulation is visibly dirty, clean it before assembly.

•If the jacket or insulation of a cable has visible damage, irreparable scuffing, or other defects, do not use the cable.

•If the shield layer of a cable is damaged, do not use the cable.

•If the cable jacket or insulation cracks after the cable is bent or twisted, discard this cable and check whether other cables have the same problem. If other cables have the same problem, replace these cables.

Checking the Appearance of Connectors

•Do not use connectors with visible defects, damage, rust or scuffing.

•Do not use connectors if their shells or pins have exposed part or uneven plating, or their pins are lost, broken, or bent.

•Do not use connectors that have dirt on their pins or in their jacks or if there are conductors between pins or between pins and the shell.

Precautions for Assembly

•Use dedicated tools or tools delivered by Huawei and follow the methods given here during assembly.

•Hold terminals of cables instead of pulling the cables themselves when installing or removing cable components.

•Take the following precautions when cutting or stripping cables:

–Make cables slightly longer than necessary.

–Coil cables longer than 2 m (6.56 ft) after cutting. Bind and fasten the coils using bundling ropes. The inner diameters of the coils should be larger than 20 times the outer diameters of the cables.

–When stripping the jackets of cables, avoid damaging the shield layers (braid or aluminum foil), insulation, core conductors, and other jackets that do not need to be stripped.

–After assembling cables, cut all visible cross sections of jackets to ensure that the cross sections are arranged neatly.

–Do not touch the core conductors of cables with your hands. Terminate exposed conductors in a timely way after stripping off insulation so that the surface of the conductors does not become oxidized.

•Take the following precautions when crimping and connecting cables or connectors:

–The terminals and conductors should be connected tightly after they are crimped. They should not be moved or turned.

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–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.

Figure 5-1 Components of an OT terminal and a power cable

A. Heat-shrinkable tubing

B. Bare crimping terminal

C. Insulation

D. Conductor

Procedure

Step 1 Based on the cross-sectional area of the cable conductor, strip a length of insulation coating C to expose the conductor D of length L1, as shown in Figure 5-2. The recommended values of L1 are listed in Table 5-1.

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Figure 5-2 Stripping a power cable (OT terminal)

NOTICE

•When you strip a power cable, do not damage the conductor of the cable.

•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

Cross-	Value of L1	Cross-Sectional	Value of L1
Sectional	(mm(in.))	Area of Conductor	(mm(in.))
Area of		(mm2(in.2))
Conductor
(mm2(in.2))
1 (0.002)	7 (0.28)	10 (0.015)	11 (0.43)
1.5 (0.002)	7 (0.28)	16 (0.025)	13 (0.51)
2.5 (0.004)	7 (0.28)	25 (0.039)	14 (0.55)
4 (0.006)	8 (0.31)	35 (0.054)	16 (0.63)
6 (0.009)	9 (0.35)	50 (0.077)	16 (0.63)

NOTE

If you are proficient in assembling OT terminals and power cables, you can obtain the value of L1 by comparing the part to be crimped with the power cable.

Step 2 Put the heat-shrinkable (A) tubing onto the bare crimping terminal, as shown in Figure 5-3.

Issue 01 (2016-09-30)	Huawei Proprietary and Confidential	24
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