Comba Telecom CWS 4240 71 User Manual

Comba Telecom Ltd.

CWS-4240-71

HIGH POWER REMOTE RADIO HEAD

PRODUCTION USER GUID

The information contained herein is confidential and the property of Comba and is supplied without liability for errors
or omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written
permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the
information may be embodied.

Version: 1-0-1 (102019)

Page ii

Table of Contents

1. OVERVIEW .................................................................................................................................................... 1

1.1. COMPLIANCE ............................................................................................................................................ 1

1.2. APPEARANCE ............................................................................................................................................ 2

1.3. NETWORK ARCHITECTURE ............................................................................................................................ 2

1.4. PHYSICAL PORTS AND INDICATION .................................................................................................................. 3

GREEN ................................................................................................................................................................ 4

NO SOFTWARE IS RUNNING OR SOFTWARE IS ON THE INITIAL ............................................................................................. 4

2. TECHNICAL SPECIFICATION ........................................................................................................................... 5

2.1. FREQUENCY BANDS .................................................................................................................................... 5

2.2. CAPACITY ................................................................................................................................................. 5

2.3. RECEIVER SENSITIVITY ................................................................................................................................. 5

2.4. OUTPUT POWER ........................................................................................................................................ 5

2.5. ELECTRICAL SPECIFICATION ........................................................................................................................... 6

2.5.1. Input Power Voltage ......................................................................................................................... 6

2.5.2. Power Consumption .......................................................................................................................... 6

2.6. MECHANICAL AND ENVIRONMENTAL SPEFICATION ............................................................................................. 6

2.6.1. Equipment size and weight ............................................................................................................... 6

2.6.2. Environmental .................................................................................................................................. 6

2.7. FRONTHAUL INTERFACE SPECIFICATION ............................................................................................................ 6

3. INSTALLATION INSTRUCTIONS ...................................................................................................................... 7

3.1. PACKING LIST ........................................................................................................................................... 7

3.2. TO OLS R E QU IRE MENT .......................................................................................................................... 7

3.3. IN ST ALL ATI ONS .................................................................................................................................... 7

3.3.1. RRH Installation Step ........................................................................................................................ 7

3.3.2. Cable Making Instructions................................................................................................................11

3.3.3. Grounding .......................................................................................................................................12

3.3.4. Bottom Ports ...................................................................................................................................13

Version: 1-0-1 (102019)

Page iii

Document History

Page No.

Version

Revised By

Details of Change

n/a

1-0-0

HaiLong Deng

First Release

Version: 1-0-1 (102019)

Page iv

List of Abbreviations

Abbreviation

Meaning

3GPP

3rd Generation Partnership Project

AC

Alternating Current

ANT

Antenna

BBU

Baseband Unit

BTS

Base Transceiver Station

CDMA

Code Division Multiple Access

CINR

Carrier to noise ratio

CLI

Command-Line Interface

CPICH

Common Pilot Channel

CPRI

Common Public Radio Interface

CU

Central Unit

DU

Distributed Unit

DC

Direct Current

DL

Down Link

FFT

Fast Fourier Transform

GUI

Graphical User Interface

GSM

Global System for Mobile Communications

IFFT

Inverse Fast Fourier Transform

IP Rating

Level of Protection

IP

Internet Protocol

LAN

Local Area Network

LED

Light-Emitting Diode

LMT

Local Maintenance Terminal

LTE

Long Term Evolution

MIMO

Multiple Input Multiple Output

NMS

Network Management System

NR

New Radio

PSU

Power Supply Unit

PHY

Physical Layer

RAN

Radio Access Network

RF

Radio Frequency

RSRP

Reference Signal Received Power

RSSI

Received Signal Strength Indicator

Rx

Receive

SFP

Small Form-factor Pluggable

Tx

Transmit

UL

Uplink

UMTS

Universal Mobile Telecommunication System

VLAN

Virtual LAN

Version: 1-0-1 (102019)

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BLANK PAGE

ENB35A77R Product Description

Version: 1-0-0 (102019)

Comba Confidential

Copyright © Comba Telecom Ltd.

Page 1

1. OVERVIEW

High Power Remote Radio Head (RRH) is a part of Comba’s 4G/5G OPEN RAN solution. The CWS-4240-71
RRH is an outdoor remote radio head for macro BTS site. It built on the state-of-the-art Comba high power
and efficient linear power amplifiers technology, innovative RF filter and industrial design. Featuring with a
compact size, light-weight and low power consumption specification. It supports 2T2R and 4T4R configurations,

multi-carries and multi-technology operation suitable for most mobile operator capacity requirement.

The CWS-4240-71 complaint with the latest Open RAN Alliance fronthaul interface standards. It adopted the
split 7-2 option in the RAN functional split specified in 3GPP which significantly reduce the fronthaul connection
data rate in order to support higher modulation and MIMO in 4G LTE and 5G NR. The software in CWS-4240­71 is developed by Comba including the lower physical layer (Low-PHY) functions, synchronization and
management protocols. They are compatible with Open RAN Alliance standards compliant BBU software. The
BBU software perform the other RAN functions and the interface to the core network. It’s fronthaul interface

also supports the eCPRI as well as CPRI protocol as transport protocol.

1.1. COMPLIANCE

FCC ID: PX8CWS-4240-71

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

To comply with FCC RF exposure compliance requirements, each individual antenna used for this device
must be installed to provide a separation distance greater than 442.2cm or more from all persons during
normal operation and must not be co-located with any other antenna for meeting RF exposure requirements.

Warning! Any installation, adjustment, maintenance and repair of the equipment must only be carried out by
trained, authorized personnel. At all times, personnel must comply with any safety notices and instructions.

The circumscribed antenna should not exceed 12.5dBi.