1. NEC 2000 Series
Source:NECAmerica, Inc., MicrowaveRadio Group
The NEC 2000 Series synchronousdigital (SONET/SDH) microwave radio providesreliable, high-
capacity radio links for network communications
NEC America, Inc., MicrowaveRadio Group0 Series synchronousdigital (SONET/SDH) microwaveradio
providesreliable, high-capacity radio links fornetwork communications.Thisradio is currently available
in the 6, 7 and11 GHz bands. The2000 Seriesradio transmits an OC-3 optical,STSX-3 electrical,or
STM-1 optical/electrical signal,withtheoptionofwaysideT1 and digitalservicechannels.High-order
modulation andadvancederrorcorrectiontechniquesareused,providing highersystemgain and
decreased interference forimproved reliability andperformance. Themicrowaveradio has built-in alarm
statusand performancemonitoring capabilities, andis availablein eitherhot stand-by or1xN protection
schemes.
Standard Features
 High Order Modulation
 AdvancedErrorCorrection
 ModularDesignforEase ofMaintenance
 Total Front Access Design
 VersatileProtection Schemes
 FlexibleInterfaces(Electrical orOptical)
 Compact Design to MaximizeUtilization
 Three YearWarranty
OptionalKey Features
 Automatic TransmitterPowerControl
 Cross PolarizationInterferenceCanceller (XPIC)
 Wayside T1 (Protected)

2. Wireless 2000: Digital Microwave
Radio
Source:NECAmerica, Inc., MicrowaveRadio Group
The 3000 Series SONET/SDHDigital MicrowaveRadio Systemis designedto carryone OC-3/STM-1
plus two optional waysideDS1s per RF channelin the 4-13GHz bands
NEC America, Inc., MicrowaveRadio GroupriesSONET/SDHDigital MicrowaveRadio Systemis
designedto carryone OC-3/STM-1 plustwo optional waysideDS1s perRF channelin the4-13GHz
bands.Employment oftheoptionalCross-polarization InterferenceCanceller(XPIC) enables thereliable
transmission ofupto 16OC-3s in the6 GHz band.
The radio housesMicrowaveIntegrated Circuits(MICs) and HybridICs (HICs). Custom-made,large-
scaleintegratedcircuits(LSIs) enableapplicationssuchas a new fully digital modemincorporatedinto a
single LSI chip.Compactness andreliability are also gainedby usinglow-power,high-speed
complementary metaloxidesemiconductor(CMOS) LSIs, whichreduceoverallpowerconsumption.
Other NEC3000 Series featuresinclude:
 ModularDesign:maximizes easeofmaintenanceandexpandability whileminimizing spares
 VariousSystemApplications:ringorlinearnetwork topology, hot standbyor1+Nprotection
 Good Threshold/InterferenceRatio and StandardATPC(Automatic TransmitterPowerControl):
eases frequencycoordination
 Synchronization Flexibility:dual externalclock inputs,clock derivedfromincomingoptical orRF
signals,redundantinternalclocks
 AdvancedOperation,Administration, Maintenance,andProvisioning(OAMP):configuration
database download,edit,anduploadcapability
 AlarmCorrelation andOnboardAlarmHistory:simplifiesfaultanalysis
 Low PowerConsumptionandConvection Cooling:no fans or filtersrequiring maintenance
 Compact,TotalFrontAccessDesign:1+7 terminal in lessthan 4 sq.ft. offloor space

3. WIRELESS 2000: 3000 Series
Digital Microwave Radio
Source:NECAmerica, Inc., MicrowaveRadio Group
The 3000 Series digital microwaveradio is designed to carry oneOC-3/STM-1, plus 2 optionalwayside
DS1s per RF channel in the4-13GHz bands
NEC America, Inc., MicrowaveRadio Groupriesdigital microwave radio is designed to carry oneOC-
3/STM-1,plus 2 optional waysideDS1s perRF channelin the 4-13GHz bands.Employment ofthe
optional
Cross-polarizationInterferenceCanceller(XPIC) enables the reliable transmissionof
up to 16 OC-3sin the 6 GHz band.
This company incorporatedits owntechnologies throughoutNECAmerica, Inc., MicrowaveRadio
Groupries, including MicrowaveIntegrated Circuits (MICs)and HybridICs (HICs), which makethe
transmittersand receivers durableandcompact. Custom-made,large-scaleintegratedcircuits(LSIs)
enableadvancedapplicationssuchas a new fully digital MODEMincorporatedinto a singleLSI chip.
Compactness and reliability arealso gainedby usinglow-power, high-speed complementary metaloxide
semiconductor(CMOS) LSIs, which reduceoverall powerconsumption.
Other NEC3000 Series featuresinclude:
 ModularDesign- maximizes easeofmaintenance and expandability whileminimizingspares
 VariousSystemApplications- ring orlinear network topology, hotstandby or1+Nprotection
 Excellent Threshold/InterferenceRatio &StandardATPC(Automatic Transmitter PowerControl) -
eases frequencycoordination
 Synchronization Flexibility - dualexternal clock inputs,clock derivedfromincoming optical orRF
signals,redundantinternalclocks
 AdvancedOperation,Administration, Maintenance&Provisioning (OAMP) - configurationdatabase
download, edit,and uploadcapability
 AlarmCorrelation &Onboard Alarm History - simplifiesfault analysis
 Low PowerConsumption&ConvectionCooling - no fansorfilters
requiringmaintenance
 Compact,TotalFrontAccessDesign - 1+7 terminal in less than 4 squarefeetoffloorspace

4. NEC 2600 SERIES
Source:NECAmerica, Inc., MicrowaveRadio Group
The NEC 2600 Seriesasynchronouslow-to-medium-capacity digital microwaveradio transmits upto 32
DS1s in a 10MHz bandwidth
NEC America, Inc., MicrowaveRadio Group0 Series asynchronouslow-to-medium-capacitydigital
microwaveradio transmits up to 32DS1s in a 10MHz bandwidth.This systemprovides in-service
softwarecontrolledcapacity upgradesfromoneto 32DS1s, allowinga network to growas required.The
radio incorporatesa unique bit rateflexiblemodemallowingforbandwidth flexibilityfrom2.5MHz to
10MHZ.The radio providesthehighesttraffic capacity available in 10MHz ofbandwidthfor a morecost-
effectivenetwork.The 2600 Seriesfeatures a high-ordermodulationand advanced errorcorrection,
which provides highersystemgainanddecreasedinterferenceforimprovedreliability andperformance.
The automatic transmitter powercontrol is a standardfeature,providing theuser additional power for
path reliabilitywhen needed.
Standard Features
 In-service,SoftwareControlled, Capacity Upgrades
 Add/Drop Capability
 Compact Design to MaximizeUtilization
 High Order Modulation
 AdvancedErrorCorrection
 Automatic TransmitterPowerControl
 Integral Multiplexer
 High Traffic Capacity(32SD1 in 10 MHz)
 FrontAccess Design
 Three YearWarranty

5. XPIC Technology Allows Increased
Capacity
Carrierscontinually have to grapplewithcapacity issues, andtheseissueswill only becomeevenmore
critical asmobileusers becomeattachedto data applications.To help operatorsserve thosehigh-capacity
needs, Irving, TX-based NECAmerica,Inc.,Microwave Radio Group, hasintroduced itscross
polarizationinterferencecancellor(XPIC) technology,which allowsserviceprovidersto carryas much as
two OC3s on a singlefrequencypair by usingbothhorizontal andverticalpolarizations.
This is significantbecausewithoutsucha technology,engineerswerestuck in an either-orsituation.
Trying to takeadvantageofbothpolarizations wouldlead to cross-polarization interference.The
technology negates thatinterference, thusallowing the carrierto transmit twicethedatait could
previously.This means thatby usingall eight channels andconfiguringthem allwiththeXPIC
technology, a carrier cantransmit asmany as 16155Mb OC-3s,or 2.6Gb ofdata,in the 6 GHz band.
Instances when this technology mightcomein handyinclude high-capacity routes—backbonerouteswith
lots offeedertraffic. Oftencarrierswill use radioswherefiberdoesn't reach, such as remoteareas,
mountainousterrain,oraroundwater, said Becky Holland,NECAmericaMicrowave Radio Sales–
WesternRegion,andwiththeXPICtechnology, the radioscancomecloserto whatfiberoffers. "It
doesn't evenhaveto beremotelocations,justareas wherefiberisn't available,"Hollandsaid.
The technology also helps carriers boost capacityin congested areas. Forexample, ifengineersareunable
to clean offall ofthefrequencies becauseofhighinterferencelevels, theycan employthecanceling
technology to getmorecapacity outofthefrequencies theyareableto use.
The XPICtechnologyis an optional featurefortheNEC3000 series radio, aswellas on the2000 series,
and carrierscan takeadvantageofthecapacity jumpwithout giving upa lot ofspace.A fullcomplement
ofradios—implementedin a 2X14 configuration—fits into fourbays, Hollandsaid.
By Ellen Jensen, ManagingEditor,Wireless NetworksOnline

6. - 2000 Series SDH Microwave Radio System
(4 to 13 GHz, STM-1) -
Outline
 A long-haul transmission system
covering the 4 GHz to 13 GHz band
 Conforms to the latest standards
 Offers various system applications
and is easy to expand
Applications
 Trunk-line systems connecting
switching nodes
 A backup system for a FOTS
Key Features
 Has 128 QAM (28 - 30 MHz separation) and 64 QAM (40
MHz separation)
 Employs forward error correction with NEC's original multi-
level coded modulation (MLCM) technology
 A decision feedback equalizer (DFE) reducing the influence
of distortions caused by multipath fading
 Automatic transmit power control (ATPC) preventing
interference with neighboring systems
 Various baseband interfaces available, including STM-1
electrical or optical and 140 Mbps
 Wayside traffic also available--2 Mbps in addition to STM-1
 Co-channel transmission by dual polarization in thesame
frequency performed with a cross polarization interference
canceller (XPIC)
 A cmpact design minimizing floor space requirements

8. Wireless 2000: Digital Microwave
Radio
Source:NECAmerica, Inc., MicrowaveRadio Group
The 3000 Series SONET/SDHDigital MicrowaveRadio Systemis designedto carryone OC-3/STM-1
plus two optional waysideDS1s per RF channelin the 4-13GHz bands
NEC America, Inc., MicrowaveRadio GroupriesSONET/SDHDigital MicrowaveRadio Systemis
designedto carryone OC-3/STM-1 plustwo optional waysideDS1s perRF channelin the4-13GHz
bands.Employment oftheoptionalCross-polarization InterferenceCanceller(XPIC) enables thereliable
transmission ofupto 16OC-3s in the6 GHz band.
The radio housesMicrowaveIntegrated Circuits(MICs) and HybridICs (HICs). Custom-made,large-
scaleintegratedcircuits(LSIs) enableapplicationssuchas a new fully digital modemincorporatedinto a
single LSI chip.Compactness andreliability are also gainedby usinglow-power,high-speed
complementary metaloxidesemiconductor(CMOS) LSIs, whichreduceoverallpowerconsumption.
Other NEC3000 Series featuresinclude:
 ModularDesign:maximizes easeofmaintenanceandexpandability whileminimizing spares
 VariousSystemApplications:ringorlinearnetwork topology, hot standbyor1+Nprotection
 Good Threshold/InterferenceRatio and StandardATPC(Automatic TransmitterPowerControl):
eases frequencycoordination
 Synchronization Flexibility:dual externalclock inputs,clock derivedfromincomingoptical orRF
signals,redundantinternalclocks
 AdvancedOperation,Administration, Maintenance,andProvisioning(OAMP):configuration
database download,edit,anduploadcapability
 AlarmCorrelation andOnboardAlarmHistory:simplifiesfaultanalysis
 Low PowerConsumptionandConvection Cooling:no fans or filtersrequiring maintenance
 Compact,TotalFrontAccessDesign:1+7 terminal in lessthan 4 sq.ft. offloor space