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Low capacityDigital Radio System

SRAL XD

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Contents

ApplicationsMain features

System architecture

Installation &maintenance

Management

Technical data

market indications and trends, addsto its extensive microwave portfoliothe new line of point to point lowcapacity digital radio: SRAL XD.

Siemens expertise covers most of theoutstanding technologies whichcurrent applications are based on:switching, cellular technology, radioand networking, voice and data overIP and ATM.An outstanding turnkey projectmanagement capability, the ownershipof a so wide range of in-house productlines and a worldwide field provenexperience, represent the unequaledSiemens business card.

Microwave systems cover mostof connectivity needs especially inthe lower layers of the transmissionnetworks, consolidating their roleof reliable, easy-to-install and cost-effective access solution. Siemens,used to be one of the frontrunnersin this market segment, is ready tomatch the expectations of the newincoming telecommunication eracharacterized by broadband andmobility convergence.Nowadays, the new challengelaunched by operators aims toincrease link density and capacity,leaving spectrum occupancypractically unchanged.Siemens, always ready to acknowledge

3G Cells

2G Cells

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A wide-range of applications ispossible, particularly since voiceand data can be transmitted overthe same microwave link.

A typical scenario is an enterprisewith a branch office located at somedistance from the main premises.Service convergence is the wordsummarizing the trend of this kindof network, and once again flexibilitybecomes a must even in this case.

SRAL XD line is primarily designed forurban networks, but is also suitablein regional networks meeting all therequirements of access and trunkapplications.

• Mobile Networks: in the 3G MobileATM based network, typically SRAL XDis used to collect traffic conveyingfrom NodeB to Hub stations; in the2G networks it is already implementedto provide access to core networks.In the next future, the overlayof the two mobile networks willcertainly benefit from SRAL XDupgrading facilities, rewardingoperators with flexible and versatileinfrastructures.

• Fixed services Networks: SRAL XDsupports ATM/IP networks, LANand WAN.

Applications

Other MobileOperators

PSTN/ISDN

Public Internet

EnterpriseIntranetHQ

Branch Office

IP LAN

MSC

SGSN

GGSN

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Add/Drop and Crossconnectionfunctionalities enrich the set of SRAL XDfeatures: any E1 stream plugged inthe near end terminal can beextracted from any E1 connectorof the far end terminal, eliminatingthe need of bulky distribution frames.Furthermore, the Add/Drop facilitypermits to drop the required E1 instation leaving the remaining streams

Based on network specific needs, theoperator can select either higherspectrum efficiency or higher systemgain and hop lengths.All the parameters can be softwareselected locally or remotely in orderto adapt the hardware platform toeach single link characteristic interms of available RF channel,payload, usable bandwidth and hop

length.SRAL XD flexibility and versatilitygreatly optimize all the upgradingprocedures and configurationchanges. A terminal can be easilyrelocated without any hardwaremodification simply re-shaping itspeculiar parameters on the new linkrequirements.Another important strong advantageis represented by the extremecompactness of SRAL XD Indoor Unit.A single 44 mm high unit is sufficientto implement any protected orunprotected terminal configuration,minimizing the impact oftransmission equipment.

System architecture

Main features

SRAL XD equipment is available inSplit Indoor and Outdoor Configuration;both the IDU and the ODU have beenredesigned in order to reduce theirmechanical dimension respect tothe previous SRA L generation of PDHmicrowave equipment. In fact, inorder to save room for the indoorinstallation, the dimensions of theIDU have been dramatically reduced,

passing untouched.Automatic Transmitter Power Controlhas been implemented to increasethe system performances, reducingpower consumption and interferencein crowded nodes; ATPC function canbe switched off, setting thetransmitted power to a fixed valueincluded in the ATPC interval.

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moving the mo/demodulation sectionto the ODU. As a result the IDU ableto provide protected configurations isonly 1U high.In spite of this change thedimensions of the ODU have beenreduced as well by adopting the stateof the art technology.

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TwoE1

Plug-in IDU

SingleBoard IDU

Plug-in IDU

SingleBoard IDU

ND ODUHD/HP ODU

Three different IDU families areavailable in order to providerespectively entry levelconfigurations, cost-effective solutionand maximum flexibility.• TwoE1• SingleBoard• Plug-in

Normal DensityHigh Density/High Performance

SingleBoard and Plug-in versions,being independent from modulationformat and frequency bands, are ableto manage either High or NormalDensity arrangements.

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INDOOR UNITS

TwoE1The TwoE1 indoor unit is based on a single replacement unit and it has

been appositely developed for those applications where low capacity inunprotected configuration is required.The TwoE1 family is conceived as an “entry level” solution for trafficbackhaul within access applications or mobile networks.The TwoE1 version offers 1+0 configuration with capacity up to 2xE1.

SingleBoardThe 1U high SingleBoard IDU is based on a single board architecturecharacterized by a fixed set of functionalities. Four versions are available:

• up to 8xE1 (1+0)• up to 8xE1 (1+1) Hot Stand-by• up to 16xE1 (1+0)• up to 16xE1 (1+1) Hot Stand-by

Plug-inThe Plug-in version adopts a modular architecture:the basic configuration (1+0) consists of a controller, an access cardand a base-band card; in order to arrange protected/add drop repeaterconfigurations, an additional base-band card has to be addedin the same shelf.The Plug-in version is able to provide a full set of configurations/interfaces:• (1+0)/ (1+1) Frequency Diversity/Polarization Diversity with hitless switch,

Hot Stand-by, 2x(1+0)/Add-Drop Repeater Configurations• payload interfaces: 2/4/8/16/32xE1

1xE34x10/100 BaseT + 8xE1

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State of art RF technology has beenthe baseline for SRAL XD ODUs’development, completely matchingall the technical constraintsintroduced by the high modulationscheme adopted for the HD version:system linearity and synthesizer

phase noise.

Two different outdoor units, capacityindependent, are part of SRAL XDsuit:

ODU NDis the appropriate solution fornormal density arrangement,able to achieve the best compromisebetween performance and powerconsumption by exploiting a

constant amplitude modulationformat (4 CPM).

OUTDOOR UNITS

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SRAL XD has been engineered tosimplify to the maximum extent allthe operations related to the systemsuch as installation, maintenance,upgrading and supervision.Configuration settings, systemupgrades can be remotely performedwith software downloads, withoutthe need of sending technicians on site.The compact size and reduced weightof the Indoor Units, Outdoor Unitsand antennas allow a faster andeasier deployment, together with areduced environmental impact.

The Outdoor unit can be directlymounted on the rear of the antenna,avoiding the use of any waveguide.Several mounting structures, holding

Installation & Maintenance

one or two ODUs, are available for

integrated or separated ODU-antennaconnections.Moreover, the IDU hosts anextractable“Memory Key” in which theconfiguration of the system iscontained. The use of this key allowsan easy ‘in field’ replacement of theIDU withoutthe use of the LCT, as well as off-lineinitial software configurationswithout any need for settingparameters during the installation.

ODU HD/HPborn for high density arrangements,the same equipment is capable toperform normal density arrangementas well thanks to software selectionof the relevant modulation format.The adoption of Trellis CodeModulation leads to Rx thresholdlevel unmatched by a plain 16 QAM

modulation.

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SRAL XDnetwork

SRAL XDnetwork

IP DCN

Third partynetwork

Third partynetwork

TMN channelframed in2Mbit/s tributary

Ethernet

TMN channelframed in2Mbit/s tributary

D-extchannel

D-extchannel

Ethernet

Ethernet

NetViewer

NetViewer

The Microwave Management SystemNetViewer is a versatile TMN productfor the management of PDH, SDH andPoint-to-Multipoint microwavesystems, able to supervise othervendors’ devices as well through astandard SNMP interface. An overallview of the complete networkstructure and its ability to enter downto the Network Element details give aclear picture of the whole network, itsconfiguration and events. Fault,Configuration and Performancemanagement are carried out atNetwork Element level; at Networklevel Fault and Security configurationare available.

Management

only by the existing MicrowaveSiemens NMS (NetViewer) but also bythird party Management Systems:open interfaces are available tointegrate SRAL XD and all the otherSiemens Microwave Radiotransmission equipment inmultivendor transmission networks.

Netviewer is the basic part of Siemensoffer for Network Managementoriented to microwave networks that isrepresented by the NetViewer NME Suite.The suite is composed of a number ofmodules:• NetViewer, core of the system, as

Element Manager;• SNMP Agent, a real-time

northbound interface;• TCOA (TMF CORBA Agent), a real-

time northbound interface;• NML module, as Network Manager;• HP OpenView NNM (Network Node

Manager) add-on, that allows theintegration of NetViewer in HP;OpenView NNM (product of HewlettPackard);

• HP-Compaq TeMIP add-on, thatallows the integration of NetViewerin HP OpenView TeMIP (product ofHP-Compaq).

Moreover, NetViewer can be easilyintegrated both in Siemens SDH TMNplatform (TNMS) with TNMS CoreRadio add-on, and in Mobile TMNplatform (Radio Commander) in orderto offer to the operator a uniqueinterface for management purposes.

interfaces, together with enhancedrouting functionalities: thecombination of these new featuresdramatically improves SRAL XDinterworking capabilities to fit anyDCN requirement.SRAL XD, as all Siemens microwaveproduct lines, can be managed not

For SRAL XD product line, systemconcept and embedded softwarearchitecture have been designed toallow an user-friendly and effectivelocal and remote terminals’management.SRAL XD Indoor Unit offers a widerange of management and service

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Technical data

SYSTEM PARAMETERSRF Bands 7/8 GHz 7.1-8.5 GHz

13 GHz 12,75-13,25 GHz15 GHz 14.4-15.35 GHz18 GHz 17.7-19.7 GHz23 GHz 21.2-23.6 GHz26 GHz 24.5-26.5 GHz28 GHz 27.5-29.5 GHz32 GHz 31.8-33.4 GHz

38 GHz 37.0-39.5 GHzChannel Arrangements Normal Density High Density/High Performance

Modulation 4CPM 4QAM 16TCM

Capacity 2xE1 4xE1 8xE1 16xE1/E3 2xE1 4xE1 8xE1 16xE1/E3 8xE1 16xE1/E3 32xE1

Channel Spacing (MHz) 3,5 7 14 28 3,5 7 14 28 7 14 28

RSL@ BER 10-3 (dBm)Typical Values

7GHz -94 -91 -88 -84 -95 -92 -89 -86 -88.5 -85.5 -82.58GHz -94 -91 -88 -84 -94 -91 -88 -85 -87.5 -84.5 -81.5

13GHz -93.5 -90.5 -87.5 -83.5 -94.5 -92 -88.5 -85.5 -88 -85 -8215GHz -93.5 -90.5 -87.5 -83.5 -94.5 -92 -88.5 -85.5 -88 -85 -8218GHz -93 -90 -87 -83 -93.5 -90.5 -87.5 -84.5 -87 -84 -8123GHz -92.5 -89.5 -86.5 -82.5 -93 -90 -87 -84 -86.5 -83.5 -80.526GHz -92 -89 -86 -82 -92 -89 -86 -83 -85.5 -82.5 -79.528GHz -92.5 -88.5 -85.5 -81.5 -92 -89 -86 -83 -85.5 -82.5 -79.532GHz -91 -88 -85 -81 -91.5 -88.5 -85.5 -82.5 -85 -82 -7938GHz -91 -88 -85 -81 -91.5 -88.5 -85.5 -82.5 -85 -82 -79

Output Power (dBm)Typical Values

7GHz 24 23 18

8GHz 24 22 1713GHz 20 22 1715GHz 20 20 1518GHz 18 24 1923GHz 18 20 1526GHz 18 20 1528GHz 18 20 1532GHz 17 18 1338GHz 17 17 12

Output Power 24 for 7 to 23 GHzSetting Range (dB) 20 for 26 to 38 GHz 20 15

Power Consumption 1+0 terminal: 30W(max) 1+1 terminal: 50W

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INDOOR UNITTwoE1 IDU Plug-in IDU SingleBoard

Tributary Interfaces Up to 2x2 Mbit/s E1 Up to 32x2 Mbit/s E1 Up to 16x2 Mbit/s E1

34 Mbit/s E34xEthernet 10/100 BaseT

Physical Interfaces Electrical, G.703 Electrical, G.703 Electrical, G.703Ethernet 10/100 BaseT

Auxiliary Interfaces 2 x 10/100 BaseT-TMN channels1 x V.11 co/contradirectional

user or TMN channelRS-232 LCT interface

Dimensions 44 x 430 x 240 mm(HxWxD)

Weight 1,5 kg

Power Supply Voltage -48 V ± 20 %

Temperature -5 ÷ +55 °CRange (ETS 300 019-1-3, class 3.2)

OUTDOOR UNITODU ND ODU HD/HP

Dimensions 230x230x110 mm 270x270x150 mm(HxWxD)

Weight 4,5 kg 7,5 kg

Temperature -33 ÷ +55 °CRange (ETS 300 019-1-4, class 4.1)

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Siemens Mobile Communications S.p.A.Sales OfficeViale P. e A. Pirelli, 1020126 Milano - ItalyPhone + 39 02 243 1

F4.1 1765/1000 • Siemens Mobile Communications SpaPrinted in Italy

This publication is issued to provide information only and is not to formpart of any order or contract. The products and services described hereinare subject to availability and to change without notice.

All brand names and trademarks mentioned in this document arethe property of their respective owners.

www.siemens.com/mn

Acronyms and AbbreviationsATM Asynchronous Transfer ModeATPC Automatic Transmitter Power ControlBTS Base Transceiver StationCPM Continuous Phase ModulationDCN Data Communication NetworkIDU Indoor UnitLCT Local Craft TerminalNMS Network Management SystemODU Outdoor UnitPDH Plesiochronous Digital HierarchyQAM Quadrature Amplitude Modulation

RF Radio FrequencySDH Synchronous Digital HierarchySNMP Simple Network Management ProtocolTCM Trellis Code ModulationTMN Telecommunication Management Network