Ericsson MINI-LINK E, MINI-LINK E Micro Technical Description
MINI-LINK E and E Micro
Technical Description
MINI-LINK
™
MINI-LINKEandEMicro
E
Technical Description
Copyright
© Ericsson Microwave Systems AB. All rights reserved. No parts of this
publication may be reproduced, stored in a retrieval system, or t ransmitted in
any form or by any means, electronic, mechanical, photocopying, recording or
otherwise, without prior permission of the publisher.
Disclaimer
The contents of this document are subject to revision without notice due to
continued progress in methodology, design, and manufacturing. Er icsson shall
have no liability for any error or damage of any kind resulting from the use
of this document.
If there is any conflict between this document and compliance statements, the
latter will supersede this document
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MINI-LINKEandEMicro
Conte
1 Introduction 1
1.1 General 1
1.2 Applications 2
1.3 Main Features 5
1.4 Related Documents 6
2 Product Program 7
2.1 Introduction 7
2.2 MINI-LINK E 8
2.3 MINI-LINK E M icro 18
2.4 Network Management 20
3MINI-LINKE 23
3.1 General 23
3.2 Radio Units 23
nts
3.3 RAU1 (7-E and 8-E) 25
3.4 RAU1 (15-E, 18-E, 23-E, 26-E and 38-E) 30
3.5 RAU2 35
3.6 Access Module 40
3.7 AMM – Access Module Magazine 41
3.8 MMU – Modem Unit 43
3.9 SMU – Switch Multiplexer Unit 53
3.10 SAU – Service Access Unit 63
3.11 ETU – Ether net Interface Unit 69
3.12 Traffic Routing 74
3.13 Upgrading 77
4 MINI-LINK E Micro 79
4.1 General 79
4.2 RTU – Radio Unit 79
4.3 Block Diagram 82
4.4 Modem Board 82
4.5 Microwave Unit 86
4.6 Filter Unit 88
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5 Antennas 89
5.1 Antenna Description 89
5.2 Antenna Installation 90
6 Management System 93
6.1 Operation and Maintenance Facilities 93
6.2 MSM – MINI-LINK Service Manager 110
6.3 MINI-LINK Netman 111
7 Accessories 113
7.1 RCB – Radio Connection Box 113
7.2 MXU – MINI-LINK Cross-connect Unit 115
7.3 DDU – DC Distribution Unit 120
7.4 PSU – AC/DC Power Supply Unit 122
7.5 Terminal Server 124
8 Technical Data 125
8.1 System Parameters 125
8.2 Antenna Data 135
8.3 Environmental Requirements 139
8.4 Power Supply 140
8.5 Cables 143
8.6 Interfaces 147
8.7 ETU Data 152
8.8 MXU Data 152
8.9 Fan Unit Data 154
8.10 DDU Data 154
8.11 PSU Data 154
8.12 Mechanical Data 156
8.13 Management System Data 171
Glossary 175
Index 179
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1 Introduction
1.1 General
MINI-LINK E and MINI-LINK E Micro are product families for medium capacity
point-to-point microwave transmission. The purpose of this description is
to support the reader with detailed information on included products with
accessories, from technical and functional points of view.
For ordering information, please refer to the latest revision of the MINI-LINK E
and E Micro P roduct Catalog (AE/LZT 110 2011).
You m ay also contact your Ericsson representative or the business manager for
your country at:
MINI-LINKEandEMicro
Ericsson Microwave Systems AB
Transmission & Transport Networks
SE-431 84 Mölndal, SWED EN
Telephone: +46 31 747 00 00
Fax: +4631277225
1.1.1 Revision Information
This revision of the MINI-LINK E and E Micro Technical Description includes the
introduction of the following:
• Ethernet Interface Unit (ETU)
• RAU2 for 28 GHz
• 1.8 m compact antennas
• Terminal server
Most of the technical description of MINI-LINK Netman in Section 6.3 on page
111 has been transferred to Netman Technical Description (AE/LZT 110 5048).
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1.2 Applications
MINI-LINK is a member of Ericsson’s large and extensive product portfolio for
telecommunications. The combined expertise of Ericsson, covering switching,
cellular technology, radio and network ing, provides excellent turnkey project
management. MINI-LINK integrates fully with existing telecom networks, adding
new levels of flexibility. It has proved to be a reliable communication medium, a
highly competitive alternative to copper and fiber cable.
MINI-LINK E and E Micro provides point-to-point microwave transmission from
2 up to 34+2 (17x2) Mbit/s, operating within the 7 to 38 GHz frequency bands.
They are briefly described as follows:
• MINI-LINK E comprises an indoor access module and an outdoor radio
unit with antenna. It offers flexibility and capacity at small sites as well as
large multi-terminal sites. Terminals can be configured for different network
types: star, tree or ring. For protection, they can be configured either as a
1+1 system or as a ring structure.
• MINI-LINK E Micro is a compact all-outdoor term inal providing minimal
total site cost, typically used at end sites together with other all-outdoor
equipment.
A mobile transmission network is by far the most common application of
MINI-LINK E and E Micro, where they are deployed in the Low Capacity Radio
Access Network ( LRAN).
MSC - Mobile Switching Center
MG - Media Gateway
BSC - Base Station Controller
RNC - Radio Node Controller
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Switch site
Transmission
hub site
MSC/
MG
HUB
BSC/
RNC
HUB
MSC/
MG
HUB
Core Network
High Capacity Radio
Access Network
(HRAN)
Low Capacity Radio
Access Network
(LRAN)
Figure 1 A mobile transmission network
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MINI-LINK
Base station
MSC
BSC
Figure 2 Example of a mobile network, where MINI-LINK products connect
radio base stations to switching centers
3503
The figure below shows an example of how MINI-LINK E and E Micro can be
used in different network topologies.
Star
Ring
Tree
MINI-LINK E
MINI-LINK E Micro
Figure 3 Example of network topologies
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The following figures show applications in a pr ivate and fixed network.
PBX
PBX
Public
network
PBX
3501
Figure 4 Example of a private network, where MINI-LINK products connect
major sites
RSS
AXE
RSS
RSM
RSS
3502
Figure 5 Example of a fixed network using AXE systems, where remote
subscriber access units are connected to the network with MINI-LINK products
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1.3 Main Features
Technical features
• Extremely compact and integrated design
• The radio and antenna form an integrated outdoor part
• High system gain and spectrum utilization with an advanced m odulation
process and coding
• 2 to 17x2 (34+2) Mbit/s traffic capacity
• Software tool for easy installation
• Advanced element manager
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• Standardized interfaces
• Low weight and power consumption
Reliability
• High Mean Time Between Failure ( MTBF)
• Progress with backward compatibility
• Part of the Ericsson system portfolio
• 30 years’ experience of microwave transmission
• World’s largest production of microwave transmission systems
• MINI-LINK equipment can cope with extreme environments
Services
• Ericsson turnkey capability
• Customer training programs worldwide
• Total field maintenance services
• Ericsson local presence in more than 140 countries
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1.4 Related Documents
This section gives an overview of some MINI-LINK E and E Micro related
documents. The documents can be ordered separately and can also be
downloaded from the Ericsson Intranet and customer Extranet portals.
MINI-LINK E and E Micro Product Catalog (AE/LZT 110 2011)
The product catalog is intended to be an aid when compiling an order or just
to give a more detailed overview of the products in the MINI-LINK E and E
Micro product families.
Netman Technical Description (AE/LZT 110 5048)
The document describes the technical features of the element management
system Netman.
MINI-LINK E and E Micro Planning and Engineering Manual (EN/LZT 110
2013)
The manual is used for planning and engineering of a MINI-LINK E and E Micro
network.
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2 Product Program
2.1 Introduction
A terminal is one side of a microwave radio link hop, between two geographical
locations. The networks of today contain both single terminal sites and more
complex multi-terminal sites. MINI-LINK E and E Micro feature these types of
terminal configurations, further described in this chapter.
MINI-LINKEandEMicro
MINI-LINK E
Antenna
Radio
unit
Access
module
To operator
equipment
Radio
unit
operator equipment
Figure 6 Two examples of terminal configuration
MINI-LINK E Micro
Antenna
To all-outdoor
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2.2 MINI-LINK E
Several M INI-LINK E terminals can be integrated into one common access
module. This enables extremely compact network sites as well as efficient
sharing of resources between different terminals, such as multiplexers, service
channel interfaces and support systems.
Traffic routing and re-routing within a network site can be performed with a
minimum of external cables. Traffic routing is software configured during station
setup.
Terminals can be configured for unprotected (1+0), protected (1+1) terminals
or ring protection.
Each terminal provides traffic capacity for up to 17x2 (34+2) Mbit/s.
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Figure 7 A MINI-LINK E multi-terminal site
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2.2.1 System Components
Figure 8 The main parts of a MINI-LINK E terminal
Radio
unit
Access
module
To operator
equipment
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Antenna
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A MINI-LINK E terminal consists of an outdoor and indoor part. There are also
a number of well-adapted accessories, both hardware and software.
Outdoor Part
The outdoor part is fully independent of traffic capacity and supplied for various
frequency bands.
It consists of an antenna module, a Radio Unit (RAU) and associated
installation hardware. The antenna and the radio unit are either integrated or
installed separately. For protected systems (1+1), two radio units and one or
two antennas are used.
Indoor Part
The indoor part, the access module, is fully independent of frequency band
and supplied in different versions for various traffic capacities and system
configurations. It can support up to four radios.
It consists of a Modem Unit (MMU) and an optional Switch Multiplexer Unit
(SMU), as well as an optional Service Access Unit (SAU), all housed in one
common Access Module Magazine (AMM). For protected systems, two MMUs
and one SMU are used.
The indoor part is connected to the outdoor part with a single coaxial cable
(the radio cable).
For Ethernet traffic the optional ETU can be used, see Section 3.11 on page 69.
For ring protection the optional MINI-LINK Cross-connect Unit (MXU) can be
used, see Section 7.2 on page 115.
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Access module
(SAU)
MMU
MMU
SMU
SMU
MMU
MMU
Radio
unit
Antenna
3507
Figure 9 A multi-terminal site
2.2.2 Outdoor Installation
The radio unit and the antenna are easily installed on a wide range of support
structures.
The radio unit is fitted directly to the antenna as standard, integrated installation.
The radio unit and the antenna can also be fitted separately and connected by
a flexible waveguide.
In both cases, the antenna is easily aligned and the radio unit can be
disconnected and replaced without affecting the antenna alignment.
10
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Figure 10 The radio unit fitted directly to a 0.2 m compact antenna and a
0.6 m compact antenna respectively
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Figure 11 The radio unit and a 0.6 m compact antenna fitted separately
2.2.3 Indoor Installation
The indoor parts are fitted in 19" racks, in ETSI and BYB cabinets or directly
on the wall/desk. An access module consists of an Access Module M agazine
(AMM) and a set of different plug-in units. The following AMMs for different
applications are available as standard:
• AMM 1U for end terminals
• AMM 2U-3 for single or dual terminal sites, containing up to four plug-in units
• AMM 4U for more complex, multi-terminal sites, containing up to seven
plug-in units
The indoor part can be upgraded or reconfigured with plug-in units, providing
site flexibility.
The interconnection between the outdoor part (radio unit and antenna) and
the indoor part is a single coaxial cable carr ying full duplex traffic, DC supply
voltage, service traffic as well as operation and maintenance data.
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Figure 12 The AMM 2U-3 for a maximum of four units
3514
Figure 13 The AMM 4U for a maximum of seven units
1234
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2.2.4 Configurations
2.2.4.1 Unprotected Terminal (1+0)
As a minimum a 1+0 terminal consists of:
•RAU
• Antenna
•AMM1U
• MMU
• Coaxial cable for interconnection
MINI-LINKEandEMicro
For traffic capacities 8x2, 17x2 and 4x8+2, an SMU is required. An SAU can be
added to the AMM to provide additional alarm and control interfaces, service
channels and other customer specific applications.
AMM 1U
MMU
2x2, 4x2,
8, 2x8 or
34+2 Mbit/s
3510
Figure 14 1+0 configuration. The MMU can be installed in an AMM 1U
(AMM 2U-3 if SAU is required).
4492
Figure 15 1+0 configuration for 8x2, 4x8+2 and 17x2 Mbit/s capacities
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2.2.4.2 Protected Terminal (1+1)
As a minimum, a 1+1 terminal consists of:
• Two RAUs
• Two antennas or one antenna with a power splitter
• One AMM 2U-3 (or AMM 4U) with two MMUs and one SMU
• Two coaxial cables for interconnection
4493
Figure 16 1+1 configuration requires an AMM 2U-3 (AMM 4U can be used
as an alternative)
An SAU can also be added to the AMM to provide additional alarm and control
interfaces, ser vice channels and other customer specific applications.
The radio units can be equipped with individual antennas or connected to a
common antenna. In the case of one common antenna, the two radio units
are connected by waveguides to a power splitter, fitted on a single-polarized
antenna.
Automatic switching can be in hot standby or in working standby (frequency
diversity). Receiver switching in space diversity systems is hitless.
In hot standby mode, one transmitter is working while the other one is in
standby (that is, not transmitting but ready to transmit if the active transmitter
malfunctions). Both radio units are receiving signals. The MMU selects the
best signal according to an alarm priority list, connects it first to the SMU for
demultiplexing and then to external equipment. See Section 3.9.2.6 on page 58
for fur ther information about switching.
In working standby mode, both radio paths are active in parallel using different
frequencies.
14
The 1+1 configuration should be considered for important and/or heavy traffic
requiring high availability, but also if there are severe reflections and/or harsh
atmospheric conditions.
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2.2.4.3 Configurations at Multi-terminal Sites
Several terminals can be integrated in the same indoor AMM. Different
configurations, traffic capacities and radio frequencies can be combined. A site
can be upgraded easily by substituting and/or adding plug-in units.
• One AMM 2U-3 c an hold:
− Two unprotected (1+0) terminals or one protected (1+1) terminal
− One SAU
• One AMM 4U can hold:
− Up to four unprotected (1+0) terminals
− Two protected (1+1) terminals
− One protected (1+1) terminal plus one or t wo unprotected (1+0)
terminals
− One SAU
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Software controlled traffic routing between the terminals minimizes site cabling,
see S ection 3.12 on page 74.
One SMU can contain multiplexers/demultiplexers for two terminals. The
terminals can also share the same optional SAU. The SAU offers analog or
digital service channels as well as parallel inputs/outputs for integration of
alarms and external equipment control.
Figure 17 A multi-terminal site with drop of 7x2 Mbit/s
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2.2.4.4 Repeater Site (1+0 or 1+1)
The repeater site basically comprises two terminals, back-to-back. The two
radio units are connected by using two MMUs in the same access module
without any external cables.
Figure 18 A 1+0 repeater site
Drop/Insert
If one or more traffic signals are to be dropped and/or inserted at the repeater
site, this can be accomplished either directly at the MMUs, provided that M MUs
with 2 Mbit/s interfaces are selected or by including an SMU on the site.
An SAU can be added to the AMM to provide additional alarm and control
interfaces, ser vice channels and other customer specific applications.
2.2.4.5 Ring Protection
An MX U added to the AMM enables ring protection. For further information,
see Section 7.2 on page 115.
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2.2.4.6 Ethernet Traffic
An ETU added to the AMM enables transmission of Ethernet traffic. The typical
application of the ETU is LAN-to-LAN interconnection using the following site
configuration:
•RAU
• Antenna
•AMM2U-3
•ETU
• MMU
• Coaxial cable for interconnection
MINI-LINKEandEMicro
AMM 2U-3
10BASE-T/100BASE-TX
n x E1/E2
ETU
MMU
5505
Figure 19 Typical site configuration using ETU for LAN-to-LAN interconnection
with optional PDH traffic connected to the MMU
The ETU can also be used in a protected (1+1) terminal configuration or in
multi-terminal configurations.
For more information on the ETU, see Section 3.11 on page 69.
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2.3 MINI-LINK E Micro
MINI-LINK E Micro is a ver y small and easily installed all-outdoor radio, housing
all transmission components. It can be used at all-outdoor sites with up to three
unprotected (1+0) connections and provides traffic capacity for up to 2x2 Mbits.
The traffic interface has long-haul capabilities, allowing a cable length that
enables flexible installation of the terminal.
A terminal consists of an outdoor radio unit (RTU), an antenna and an optional
Radio Connection Box (RCB).
For more information on MINI-LINK E Micro, see Section 4 on page 79.
Figure 20 M INI-LINK E Micro with a 0.2 m compact antenna
2.3.1 Configurations
Figure 21 A MINI-LINK E Micro terminal with traffic and DC cables
MINI-LINK E Micro has standardized t raffic interfaces for 2 or 2x2 Mbit/s (only
2x2 Mbit/s for the 38 GHz version).
Traffic
DC
3521
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The terminal can be DC or AC powered. On sites with only one terminal, traffic
and DC can be directly connected with two cables. On sites with more than one
terminal or where no DC supply is available, a Radio Connection Box (RCB) is
required. For more information, see Section 7.1 on page 113.
The gray painted radio unit fits onto the back of the antenna, but can equally
well be installed separately from the antenna and connected with a waveguide
feeder.
Applications for MINI-LINK E Micro are in mobile telephony, business access,
PBX (Private Branch eXchange), and data networks together with any outdoor
installed telecom equipment.
It can be used as an end-terminal or when using the RCB as a repeater or
multi-terminal site.
Figure 22 MINI-LINK E M icro with RCB, multi-terminal site
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2.4 Network Management
The maintenance features enable flexible and easy setup and facilitate
faultfinding and repair. N etwork management features are:
• Alarm transfer channel
• Performance monitoring
• Near and far-end loop-back tests
• Data and voice service channels
• Software controlled routing of traffic
• Software selectable output power and frequency
• Remote software upgrade
• Capacity agile MMU configuration
PSTN back-up
or other line
Leased line or
other fixed channel
Radio Unit/
Antenna Module
Access Module
Operation & maintenance
centre
3509
Figure 23 MINI-LINK network management
A microprocessor monitors all functional alarms and transmits them on an
Operation & Maintenance channel, which extends throughout the sub-network.
MINI-LINK Netman can be used for central supervision of the equipment in a
network.
Easy Access at Any Location
The service engineer can access the Operation & Maintenance channel
for functional alarms at any location. He thus gets an overview of t he
network status by using a PC with the MINI-LINK Service Manager (MSM)
software. The service engineer can also reconfigure the traffic routing, check
performance data or switch between operating and standby equipment. He
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can also command near-end and far-end loop-backs to be performed. Local
configuration of the capacity agile MMU at the near-end can be carried out
as well.
Local Management
The local supervision interface on the MMU enables fault finding and
measurement when a PC is not available.
Service Channel
The integrated maintenance system is optionally supplemented with two service
channels. These service channels may be configured as digital data channels
(64 kbit/s) or as omnibus voice channels with a built-in telephone interface.
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3MINI-LINKE
3.1 General
MINI-LINK E comprises an indoor access module, an outdoor radio unit with
antenna and mounting kit. The radio unit is connected to the indoor unit with
a single coaxial cable and can be combined with a wide range of antennas
for integrated or separate installation.
Radio
unit
MINI-LINKEandEMicro
Antenna
Figure 24 MINI-LINK E terminal
3.2 Radio Units
The radio units are continuously developed and improved regarding design
and technology. Two types of radio unit are available, RAU1 and RAU2. They
have the same functionality, but different mechanical design and microwave
technology. RAU2 has a higher integration of microwave circuits.
The radio units are independent of traffic capacity, that is the operating
frequency is determined by the radio unit only. The operating frequency is set
on site. This is done with the management software products or with a toggle
switch on the indoor MMU.
The radio unit is a weatherproof box painted light gray, with a handle for lifting
and hoisting. It connects to the antenna unit at the waveguide port. The radio
unit also has two hooks and catches to guide it for easier handling, when fitting
to or removing from an integrated antenna.
Access
module
To operator
equipment
3520
Radio units are available for different frequency channel arrangements
according to ITU-R and ETSI recommendations. For detailed information on
frequency versions, see Section 8 on page 125 and the MINI-LINK E and E
Micro Product Catalog (AE/LZT 110 2011).
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MINI-LINKEandEMicro
Figure 25 The RAU1 and RAU2 radio units
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