Huawei RRU3606 1900, RRU3606 800 User Manual

Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

1 RRU3606 User Guide

1RRU3606 User Guide

About This Chapter

Purpose

This describes hardware configuration, software installation, and routine maintenance of the RRU3606.

Related Versions

The following table lists the product version related to this document.

Product Name	Related Versions
RRU3606	V400R006

Intended Audience

This document is intended for: • Field engineers

• System engineers

Change History

Version	Record
01 (2008-02-25)	Initial release.

Organization

1.1Safety Information

1.2Hardware Configuration of the RRU3606

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This describes the configuration of equipment and cables of the RRU3606.

1.3 Installing Hardware for the RRU3606

This describes the hardware installation, cable distribution, and installation checklist for the RRU3606.

1.4 Maintaining the RRU3606

This describes how to maintain the RRU3606.

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1.1 Safety Information

1.1.1 Safety Precautions

This section describes certain safety precautions and helps to choose the measurement device and testing device. Read and follow these safety precautions before installing, operating, and maintaining Huawei devices.

Following All Safety Precautions

Before any operation, read the instructions and precautions in this document carefully to minimize the possibility of accidents.

The Danger, Caution, and Note items in the package of documents do not cover all the safety precautions that must be followed. They only provide the generic safety precautions for operations.

Symbols

DANGER

This symbol indicates that casualty or serious accident may occur if you ignore the safety instruction.

CAUTION

This symbol indicates that serious or major injury may occur if you ignore the safety instruction.

NOTE

This symbol indicates that the operation may be easier if you pay attention to the safety instruction.

Complying with the Local Safety Regulations

When operating the device, comply with the local safety regulations. The safety precautions provided in the documents are supplementary. You must comply with the local safety regulations.

General Installation Requirements

The personnel in charge of installation and maintenance must be trained and master the correct operating methods and safety precautions before beginning work.

The rules for installing and maintaining the device are as follows:

•Only the trained and qualified personnel can install, operate and maintain the device.

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•Only the qualified specialists are allowed to remove the safety facilities, and repair the device.

•Any replacement of the device or part of the device (including the software) or any change made to the device must be performed by qualified or authorized personnel of Huawei.

•Any fault or error that might cause safety problems must be reported immediately to the personnel in charge.

Grounding Requirements

The following requirements are applicable to the device to be grounded:

•Ground the device before installation and remove the ground cable after uninstallation.

•Do not operate the device in the absence of a ground conductor. Do not damage the ground conductor.

•The unit (or system) must be permanently connected to the protection ground before operation. Check the electrical connection of the device before operation and ensure that the device is reliably grounded.

Safety of Personnel

Ensure the following:

•When lightning strikes, do not operate the device and cables.

•When lightning strikes, unplug the AC power connector. Do not use the fixed terminal or touch the terminal or antenna connector.

NOTE

The previous two requirements are suitable for the wireless fixed terminal.

•To prevent electric shock, do not connect safety extra-low voltage (SELV) circuits to telecommunication network voltage (TNV) circuits.

•To prevent laser radiation from injuring your eyes, never look into the optical fiber outlet with unaided eyes.

•To prevent electric shock and burns, wear the electrostatic discharge (ESD) clothing, gloves and wrist strap, and remove conductors such as jewelry and watch before operation.

Device Safety

•Before operation, the device must be secured on the floor or other fixed objects, such as the walls and the mounting racks.

•Do not block ventilation openings while the system is running.

•When installing the panel, tighten the screw with the tool.

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1.1.2 Electricity Safety

High Voltage

DANGER

•The high voltage power supply provides power for running the system. Direct contact with the high voltage power supply or contact through damp objects may result in fatal danger.

•Non-standard and improper high voltage operations may result in fire and electric shock.

•The personnel who install the AC facility must be qualified to perform operations on high voltage and AC power supply facilities.

•When installing the AC power supply facility, follow the local safety regulations.

•When operating the AC power supply facility, follow the local safety regulations.

•When operating the high voltage and AC power supply facilities, use the specific tools instead of common tools.

•When the operation is performed in a damp environment, ensure that water is kept off the device. If the cabinet is damp or wet, shut down the power supply immediately.

Thunderstorm

The following requirements are suitable only for the wireless base station or the device with an antenna or GPS antenna.

DANGER

In a thunderstorm, do not perform operations on high voltage and AC power supply facilities or on a steel tower and mast.

High Electrical Leakage

CAUTION

Ground the device before powering on the device. Otherwise, the personnel and device are in danger.

If the "high electrical leakage" flag is stuck to the power terminal of the device, you must ground the device before powering it on.

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Power Cable

CAUTION

Do not install and remove the power cable with a live line. Transient contact between the core of the power cable and the conductor may generate electric arc or spark, which may cause fire or eye injury.

•Before installing or removing the power cable, turn off the power switch.

•Before connecting the power cable, ensure that the power cable and label comply with the requirements of the actual installation.

Fuse

CAUTION

To ensure that the system runs safely, when a fuse blows, replace it with a fuse of the same type and specifications.

Electrostatic Discharge

CAUTION

The static electricity generated by the human body may damage the electrostatic sensitive components on the circuit board, such as the large-scale integrated circuit (LIC).

In the following situations, the human body generates a static electromagnetic field:

•Movement of body parts

•Clothes friction

•Friction between shoes and the ground

•Holding plastic in hand

The static electromagnetic field will remain within the human body for a long time.

Before contacting the device, plug boards, circuit boards, and application specific integrated circuits (ASICs), wear a grounded ESD wrist strap. It can prevent the sensitive components from being damaged by the static electricity in the human body.

Figure 1-1shows how to wear an ESD wrist strap.

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Figure 1-1 Wearing an ESD wrist strap

1.1.3 Inflammable Environment

DANGER

Do not place the device in the environment that has inflammable and explosive air or fog. Do not perform any operation in this environment.

Any operation of the electrical device in the inflammable environment causes danger.

1.1.4 Battery

Storage Battery

DANGER

Before handling the storage battery, read the safety precautions for the handling and connection of the storage battery.

Incorrect operation of storage batteries may cause danger. During operation, ensure the following:

•Prevent any short-circuit.

•Prevent the electrolyte from overflowing and leakage.

Electrolyte overflow may damage the device. It will corrode the metal parts and the circuit boards, and ultimately damage the device and cause short-circuit of the circuit boards.

General Operations

Before installing and maintaining the storage battery, ensure the following:

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•Use special insulation tools.

•Use eye protection devices and operate with care.

•Wear rubber gloves and an apron in case of an electrolyte overflow.

•Always keep the battery upright when moving. Do not place the battery upside down or tilt it.

Short-Circuit

DANGER

Short-circuit of the battery may cause injury. Although the voltage of a battery is low, high transient current generated by short-circuit will release a surge of power.

Keep metal objects away from the battery to prevent short circuit. If they have to be used, disconnect the battery in use before performing any other operation.

Harmful Gas

CAUTION

•Do not use unsealed lead-acid storage batteries, because the gas emitted from it may result in fire or device corrosion.

•Lay the storage battery horizontally and fix it properly.

The lead-acid storage battery in use will emit flammable gas. Therefore, store it in a place with good ventilation and take precautions against fire.

High Temperature

CAUTION

High temperature may result in distortion, damage, and electrolyte overflow of the battery.

When the temperature of the battery exceeds 60oC, check whether there is acid overflow. If acid overflow occurs, handle the acid immediately.

Acid

CAUTION

If the acid overflows, it should be absorbed and neutralized immediately.

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When handling a leaky battery, protect against the possible damage caused by the acid. Use the following materials to absorb and neutralize acid spills:

•Sodium bicarbonate (baking soda): NaHCO3

•Sodium carbonate (soda): Na2CO3

Antacids must be used according to the instructions provided by the battery manufacturer.

Lithium Battery

CAUTION

There is danger of explosion if the battery is incorrectly replaced.

•Replace the lithium battery with the same or equivalent type recommended by the manufacturer.

•Dispose of the used battery according to the instructions provided by the manufacturer.

•Do not dispose of the lithium battery in fire.

1.1.5Radiation

Electromagnetic Field Exposure

CAUTION

High power radio-frequency signals are harmful to human body.

Before installing or maintaining an antenna on a steel tower or mast with a large number of transmitter antennas, the operator should coordinate with all parties to ensure that the transmitter antennas are shut down.

The base transceiver station (BTS) has RF radiation (radiation hazard). Suggestions for the installation and operation of BTSs are given in the following section. Operators are also required to comply with the related local regulations on erecting BTSs.

•The antenna should be located in an area that is inaccessible to the public where the RF radiation exceeds the stipulated value.

•If the areas where RF radiation exceeds the stipulated value are accessible to workers, ensure that workers know where these areas are. They can shut down the transmitters before entering these areas. Such areas may not exist; but if they exist, the areas must be within a range of less than 10 m around the antennas.

•Each forbidden zone should be indicated by a physical barrier and striking sign to warn the public or workers.

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Laser

CAUTION

When handling optical fibers, do not stand close to, or look into the optical fiber outlet with unaided eyes.

Laser transceivers or transmitters are used in the optical transmission system and associated test tools. Because the laser that is transmitted through the optical fiber produces a small beam of light, it has a very high power density and is invisible to human eyes. If a beam of light enters the eye, the retina may be damaged.

Normally, staring into the end of an unterminated optical fiber or broken optical fiber with the unaided eyes from a distance of more than 150 mm [5.91 in.] will not cause eye injury. Eyes may, however, be damaged if an optical tool such as a microscope, magnifying glass or eye loupe is used to stare into the bare optical fiber end.

Read the following guidelines to prevent laser radiation:

•Only the trained and authorized personnel can perform the operation.

•Wear a pair of eye-protective glasses when you are handling lasers or optical fibers.

•Ensure that the optical source is switched off before disconnecting optical fiber connectors.

•Never look into the end of an exposed optical fiber or an open connector if you cannot ensure that the optical source is switched off.

•To ensure that the optical source is switched off, use an optical power meter.

•Before opening the front door of an optical transmission system, ensure that you are not exposed to laser radiation.

•Never use an optical tool such as a microscope, a magnifying glass, or an eye loupe to look into the optical fiber connector or end.

Read the following instructions before handling optical fibers:

•Only the trained personnel can cut and splice optical fibers.

•Before cutting or splicing an optical fiber, ensure that the optical fiber is disconnected from the optical source. After disconnecting the optical fiber, use protecting caps to protect all the optical connectors.

1.1.6Working at Heights

CAUTION

When working at heights, ensure that the objects do not fall.

When working at heights, ensure that the following requirements must be met:

•The personnel who work at heights must be trained.

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•The operating machines and tools should be carried and handled safely to prevent them from falling.

•Safety measures, such as wearing a helmet and a safety belt, should be taken.

•In cold regions, warm clothes should be worn before working at heights.

•Ensure that the lifting appliances are well prepared for working at heights.

Lifting Weights

CAUTION

Do not access the areas under the arm of the crane and the goods in suspension when lifting weights.

•Ensure that the operators have been trained and qualified.

•Check the weight lifting tools and ensure that they are intact.

•Lift the weight only when the weight lifting tools are firmly mounted onto the weightbearing object or the wall.

•Use a concise instruction to prevent incorrect operation.

•The angle between the two cables should be less than or equal to 90o in the lifting of weights (See Figure 1-2).

Figure 1-2 Lifting a weight

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Safety Guide on Ladder Use

Checking the Ladder

•Check the ladder before using it. Check the maximum weight that the ladder can support.

•Never overload the ladder.

Placing the Ladder

•The slant angle is preferred to be 75o. The slant can be measured with the angle square or with arms, as shown in Figure 1-3. When using a ladder, place the wider end of the ladder on the ground and take protective measures on the base of the ladder against slippage. Place the ladder on a stable ground.

When climbing the ladder, ensure the following:

•The gravity of the body does not shift from the edge of the ladder.

•Keep balance on the ladder before performing any operation.

•Do not climb higher than the fourth highest step of the ladder.

If you tend to climb to the roof, the length of the ladder should be at least one meter higher than the eave, as shown in Figure 1-4.

Figure 1-3 Slant angle

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Figure 1-4 One meter higher than the eave

1.1.7 Mechanical Safety

Drilling

CAUTION

Do not drill on the cabinet without permission. Inappropriate drilling on the cabinet may damage the electromagnetic shielding and internal cables. Metal shavings from the drilling may result in a short-circuit of the circuit board if they get into the cabinet.

•Before drilling a hole on the cabinet, remove the cables from the cabinet.

•During the drilling, wear blinkers to protect your eyes.

•During the drilling, wear the protective gloves.

•Prevent the metal shavings from getting into the cabinet. After drilling, clean the metal shavings in time.

Handling Sharp Objects

CAUTION

When carrying the device by hand, wear the protective gloves to prevent injury by sharp objects.

Handling Fans

•When replacing a component, place the component, screw, and tool at a safe place to prevent them from falling into the running fan.

•When replacing the ambient equipment around the fan, do not place the finger or board into the running fan until the fan is switched off and stops running.

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Moving Heavy Objects

Wear the protective gloves when moving heavy objects.

CAUTION

•Be careful when moving heavy objects.

•When moving the chassis outwards, be aware about the unfixed or heavy objects on the chassis to prevent injury.

•Two persons should be available to move a chassis; one person must not move a heavy chassis. When moving a chassis, keep your back straight and move stably to prevent a sprain.

•When moving or lifting a chassis, hold the handle or bottom of the chassis. Do not hold the handle of the installed modules in the chassis, such as the power module, fan module, or board.

1.1.8Others

Inserting and Removing a Board

CAUTION

When inserting a board, wear the ESD wrist strap or gloves. Insert the board gently to prevent any bent pins on the backplane.

•Insert the board along the guide rail.

•Avoid contact of one board with another to prevent short-circuit or damage.

•Do not remove the active board before powering off.

•When holding a board in hand, do not touch the board circuit, components, connectors, or connection slots.

Bundling Signal Cables

CAUTION

Bundle the signal cables separately from the strong current cables or high voltage cables.

Cabling Requirements

At a very low temperature, movement of the cable may damage the plastic skin of the cable. To ensure the construction safety, comply with the following requirements:

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•When installing cables, ensure that the environment temperature is above 0oC.

•If cables are stored in the place below 0oC, move the cables into a place at a room temperature and store the cables for more than 24 hours before installation.

•Move the cables with care, especially at a low temperature. Do not drop the cables directly from the vehicle.

1.2Hardware Configuration of the RRU3606

This describes the configuration of equipment and cables of the RRU3606.

1.2.1 RRU3606

The RRU3606 transmits and receives radio signals to realize the communication between the wireless network and the MSs.

1.2.2 RRU3606 Cables

This describes the PGND cable, power cable, CPRI optical cable, and alarm cable of the RRU3606.

1.2.1 RRU3606

The RRU3606 transmits and receives radio signals to realize the communication between the wireless network and the MSs.

The functions of the RRU3606 are described as follows:

•The RRU3606 receives RF signals from the antenna system, down-converts the signals to IF signals, and then transmits them to the BBU3900 or the macro BTS after amplification, analog-to-digital conversion, digital down-conversion, and matched filtering.

•The RRU3606 receives downlink baseband signals from the BBU3900 or the macro BTS, forwards data from its cascaded RRU3606, performs filtering and data conversion, and upconverts RF signals to meet the transmitting frequency requirements.

•The RRU3606 multiplexes RX and TX signals over RF channels, enabling the RX signals and TX signals to share the same antenna path. In addition, the RRU3606 filters the RX signals and TX signals.

1.2.1.1 Appearance of the RRU3606

This describes the dimensions and appearance of the RRU3606.

1.2.1.2 Panels of the RRU3606

The RRU3606 has a bottom panel, cabling cavity panel, and indicator panel.

1.2.1.3 Physical Ports of the RRU3606

The physical ports of the RRU3606 are power supply ports, transmission ports, grounding ports, and RF ports.

1.2.1.4 Technical Specifications of the RRU3606

This describes the technical specifications of the RRU3606.

Appearance of the RRU3606

This describes the dimensions and appearance of the RRU3606.

The dimensions of the RRU3606 are as follows:

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•Height x Width x Depth (without the housing) = 480 mm [18.90 in.] x 270 mm [10.63 in.] x 140 mm [5.51 in.]

•Height x Width x Depth (with the housing) = 488 mm [19.21 in.] x 280 mm [11.02 in.] x 155 mm [6.10 in.]

The RRU3606 features a modular structure with its ports at the bottom of the RRU3606 and on the cabling cavity. Figure 1-5 and Figure 1-6 shows the appearance of the RRU3606.

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Figure 1-5 Appearance of the RRU3606 (without the housing)

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Figure 1-6 Appearance of the RRU3606 (with the housing)

Panels of the RRU3606

The RRU3606 has a bottom panel, cabling cavity panel, and indicator panel.

Position of Panels of the RRU3606

Figure 1-7 shows the panels of the RRU3606.

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Figure 1-7 Position of panels of the RRU3606

(1) Bottom

(2) Cabling cavity

(3) Indicator

Figure 1-8 shows the panels of the RRU3606.

Figure 1-8 Panels of the RRU3606

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Indicators

Table 1-1 lists the indicators on the RRU3606 panel.

Table 1-1 Indicators on the RRU3606 panel

Mark	Color	Status	Description
RUN	Green	ON	The power input is normal,
			but the board is faulty.
		OFF	There is no power input, or
			alarms are generated.
		ON for 1s and OFF for 1s	The board operates normally.
		ON for 0.5s and OFF for 0.5s	Software is being loaded.
ALM	Red	ON	Fatal alarms
		Blinking at 0.5 Hz	Minor alarms
		OFF	No alarm is generated.
TX_ACT	Green	ON	The board operates normally.
		OFF
VSWR	Red	ON	Standing wave alarms are
			generated.
		OFF	No standing wave alarm is
			generated.
CPRI_W	Red/green	ON (green)	The CPRI link is normal.
		ON (red)	The optical module receives
			exceptional alarms, that is,
			local alarms related to the
			Loss of Signal (LOS).
		ON for 0.5s and OFF for 0.5s	The CPRI link is out of lock.
		(red)
		OFF	The optical module is not in
			position or is powered off.
CPRI_E	Red/green	ON (green)	The CPRI link is normal.
		ON (red)	The optical module receives
			exceptional alarms, that is,
			local alarms related to the
			Loss of Signal (LOS).
		ON for 0.5s and OFF for 0.5s	The CPRI link is out of lock.
		(red)

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	Mark	Color	Status	Description
			OFF	The optical module is not in
				position or is powered off.

Ports

Table 1-2 lists the ports on the RRU3606 panel.

Table 1-2 Ports on the RRU3606 panel

	Item	Label on the Front Panel	Description
	Ports at the bottom	RX_IN/OUT	Reserved port
		RET/PWR_SRXU	Reserved port
		ANT_TX/RXA	Main RF transmitting/receiving
			port
		ANT_RXB	Diversity RF receiving port
	Ports on the	RS485/EXT_ALM	Alarms port
	cabling cavity
		CPRI_E	CPRI ports
		CPRI_W
		RTN(+)	Power supply ports
		NEG(-)
		PGND	PGND crimp piece

Physical Ports of the RRU3606

The physical ports of the RRU3606 are power supply ports, transmission ports, grounding ports, and RF ports.

Table 1-3 lists the physical ports of the RRU3606.

Table 1-3 Physical ports of the RRU3606

	Type	Port	Description	Quantit	Connector Type
				y
	Power	RTN(+)	-48 V DC power	1	OT terminal
	supply		supply
		NEG(-)
	ports
	Transmis	CPRI_E	CPRI ports	1	ESFP socket
	sion ports
		CPRI_W	CPRI ports	1	ESFP socket

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	Type	Port	Description	Quantit	Connector Type
				y
	Alarms	RS485/	RS485 x1 signal	1	DB15
	port	EXT_ALM	port
	Groundin	-	-	4	-
	g port
	RF port	ANT_TX/RXA	Main	1	Round and waterproof
			transmitting/		DIN connector
			receiving port
		ANT_RXB	Diversity	1	Round and waterproof
			receiving port		DIN connector
	Reserved	RX_IN/OUT	Reserved	-	-
	port
		RET/	Reserved	-	-
		PWR_SRXU

NOTE

The specifications for the RRU3606 alarm port are: 0.2 kohm for the closed resistance; 51 kohms for the open resistance.

Technical Specifications of the RRU3606

This describes the technical specifications of the RRU3606.

Table 1-4 lists the specifications of the RRU3606.

Table 1-4 Technical specifications of the RRU3606

Item	Specification
Voltage	-48 V (-37 V DC to -60 V DC)
Power consumption	≤ 300 W
Weight	The weight of the RRU3606 and housing is no more
	than 17.5 kg [38.58 lb.].
Cabinet dimensions (height x width	Height x Width x Depth (with the housing): 488 mm
x depth)	[19.21 in.] x 280 mm [11.02 in.] x 155 mm [6.10 in.]

1.2.2 RRU3606 Cables

This describes the PGND cable, power cable, CPRI optical cable, and alarm cable of the RRU3606.

1.2.2.1 PGND Cable of the RRU3606

The PGND cable ensures the grounding of the RRU3606.

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1.2.2.2 Power Cable of the RRU3606

This describes the power cable of the RRU3606. The -48 V DC power cable feeds external -48 V DC power to the RRU3606 to provide power supply for the RRU3606.

1.2.2.3 RRU3606 Optical Fibers

RRU3606 optical fibers are used for the connection between the BBU3900 and the RRU3606.

1.2.2.4 Alarm Cable of the RRU3606

The alarm cable leads one RS485 alarm signal from external devices to the RRU3606, thus monitoring the external devices.

PGND Cable of the RRU3606

The PGND cable ensures the grounding of the RRU3606.

Structure

The green and yellow PGND cable has a cross-sectional area of 16 mm2 [0.02 in.2]. Both ends of the cable are 2-hole OT terminals. If the PGND cable is provided by the customer, a coppercore cable with a minimum cross-sectional area of 16 mm2 [0.02 in.2] is recommended.

Figure 1-9 shows the structure of the PGND cable.

Figure 1-9 Structure of the PGND cable

(1) 2-hole OT terminal

(2) Heat shrink tube

NOTE

•The OT terminals of the grounding cable are made on site.

•The color of the PGND cable is selected according to the local specifications.

Position of the Cable

For the PGND cable of the RRU3606, one end is connected to the grounding hole on the RRU3606, and the other end is connected to the ground nearby. Figure 1-10 shows the connections of the PGND cables.

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Figure 1-10 Installation position of the PGND cable

Power Cable of the RRU3606

This describes the power cable of the RRU3606. The -48 V DC power cable feeds external -48 V DC power to the RRU3606 to provide power supply for the RRU3606.

Structure

The RRU3606 uses the -48 V DC shielded power cable. One end of the cable has two OT terminals, and the other end is bare. Figure 1-11 shows the power cable of the RRU3606.

Figure 1-11 Structure of the -48 V DC power cable

(1) -48 V DC power cable

(2) Shielding layer

(3) Wire

(4) OT terminal

Cable Specifications

The -48 V DC cable is a 2-wire cable, as shown in Table 1-5 and Table 1-6.

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Table 1-5 Pin assignment of the -48 V DC power cable (standard in North America)

Name	Color
NEG cable	Blue
RTN cable	Black

Table 1-6 Pin assignment of the -48 V DC power cable (standard in Europe)

Name	Color
NEG cable	Blue
RTN cable	Brown

Position of the Cable

Connect the OT terminal of the blue wire of the -48 V DC power cable to the NEG (-) port on the RRU3606 cabling cavity, and connect the black or brown wire to the RTN (+) port of the RRU3606.

Connect the other end of the -48 V DC power cable to the power supply system at the installation site.

Figure 1-12 shows the installation position of the power cable on the RRU3606 side.

Figure 1-12 Installation of the power cable on the RRU3606 side

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RRU3606 Optical Fibers

RRU3606 optical fibers are used for the connection between the BBU3900 and the RRU3606.

Structure

The CPRI optical cable is a multi-mode 2-wire cable with LC connectors at both ends. Figure 1-13 shows the CPRT optical fiber.

Figure 1-13 Structure of the CPRI optical fiber

(1) DLC connector

(2) Label

(3) Fiber tail

Cable

Table 1-7 describes the pin assignment for the fiber tails.

Table 1-7 Pin assignment for the fiber tails

Label	Color	Connection Position
1A	Orange	RX port on the RRU3606
1B	Gray	TX port on the RRU3606
2A	Orange	TX port on the BBU3900
2B	Gray	RX port on the BBU3900

Position of the Cable

One end of the CPRI optical fiber is connected to the SFP port of the BBU3900 or to the ODF, and the other end is connected to the CPRI optical port of the RRU3606. Figure 1-14 shows the installation position of the CPRI optical fiber on the RRU3606 side.

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1 RRU3606 User Guide

Figure 1-14 Structure of the CPRI optical cable

(1) Pluggable optical modules

(2) To the BBU3900 or the ODF

Alarm Cable of the RRU3606

The alarm cable leads one RS485 alarm signal from external devices to the RRU3606, thus monitoring the external devices.

Structure

One end of the alarm cable is a DB15 female connector, and the other end has 8 cord end terminals, as shown in Figure 1-15.

Figure 1-15 Structure of the alarm cable of the RRU3606

NOTE

If the connector of the alarm cable and the port of the alarm device do not match, remove the cord end terminals. Prepare the connector on site based on the port type of the alarm device.

Cable

The alarm cable supports one RS485 alarm signal. Table 1-8 lists the pin assignment for the wires of the RRU3606.

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1 RRU3606 User Guide

Table 1-8 Alarm cable of the RRU3606

	X1 Pin	Cord End	Wire Color	Wire Type	Label
		Terminal
	X1.2	X2	White/blue	Twisted pair	SWITCH_INP
				cable	UT0+
	X1.3	X3	Blue		GND
	X1.6	X4	White/orange	Twisted pair	SWITCH_INP
				cable	UT1+
	X1.7	X5	Orange		GND
	X1.10	X6	White/green	Twisted pair	RS485_TX-
				cable
	X1.11	X7	Green		RS485_TX+
	X1.13	X8	White/brown	Twisted pair	RS485_RX-
				cable
	X1.14	X9	Brown		RS485_RX+

Position of the Cable

The DB15 male connector of the alarm cable is connected to the RS485/EXT_ALM port on the RRU3606 cabling cavity, and the other end is connected to the port for Boolean alarm signals on the external device. Figure 1-16 shows the installation position of the alarm cable on the RRU3606 side.

Figure 1-16 Installation of the alarm cable on the RRU3606 side

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