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  <xs:element name="ScheduleOfEstimatedUsefulLifeOfPropertyAndEquipmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfEstimatedUsefulLifeOfPropertyAndEquipmentAbstract"/>
  <xs:element name="ScheduleOfComputationOfBasicAndDilutedIncomePerShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfComputationOfBasicAndDilutedIncomePerShareAbstract"/>
  <xs:element name="ScheduleOfPropertyAndEquipmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfPropertyAndEquipmentAbstract"/>
  <xs:element name="ScheduleOfBreakdownOfIntangibleAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfBreakdownOfIntangibleAssetsAbstract"/>
  <xs:element name="ScheduleOfEstimatedAnnualAmortizationExpenseForEachOfTheNextFiveFiscalYearsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfEstimatedAnnualAmortizationExpenseForEachOfTheNextFiveFiscalYearsAbstract"/>
  <xs:element name="ScheduleOfGoodwilAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfGoodwilAbstract"/>
  <xs:element name="ScheduleOfGoodwillByReportableSegmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfGoodwillByReportableSegmentAbstract"/>
  <xs:element name="ScheduleOfBusinessAcquisitionPurchasePriceFairValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfBusinessAcquisitionPurchasePriceFairValueAbstract"/>
  <xs:element name="ScheduleOfDebtAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfDebtAbstract"/>
  <xs:element name="ScheduleOfLeaseCostAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfLeaseCostAbstract"/>
  <xs:element name="ScheduleOfOperatingLeaseLiabilityMaturityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfOperatingLeaseLiabilityMaturityAbstract"/>
  <xs:element name="ScheduleOfSharesCommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfSharesCommonStockAbstract"/>
  <xs:element name="ScheduleOfUnvestedRestrictedSharesIssuedToEmployeesAndBoardOfDirectorsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfUnvestedRestrictedSharesIssuedToEmployeesAndBoardOfDirectorsAbstract"/>
  <xs:element name="ScheduleOfWarrantIssuanceAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfWarrantIssuanceAbstract"/>
  <xs:element name="ScheduleOfWarrantsOutstandingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfWarrantsOutstandingAbstract"/>
  <xs:element name="ScheduleOfOptionActivityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfOptionActivityAbstract"/>
  <xs:element name="ScheduleOfReportableSegmentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfReportableSegmentsAbstract"/>
  <xs:element name="ScheduleOfRelatedPartyTransactionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfRelatedPartyTransactionsAbstract"/>
  <xs:element name="ScheduleOfSupplementalCashFlowInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfSupplementalCashFlowInformationAbstract"/>
  <xs:element name="ScheduleOfComponentsOfBenefitForIncomeTaxesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfComponentsOfBenefitForIncomeTaxesAbstract"/>
  <xs:element name="ScheduleOfDeferredTaxAssetsLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfDeferredTaxAssetsLiabilitiesAbstract"/>
  <xs:element name="ScheduleOfWeightedAverageNumberOfCommonStockSharesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfWeightedAverageNumberOfCommonStockSharesAbstract"/>
  <xs:element name="ScheduleOfIntangibleAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfIntangibleAssetsAbstract"/>
  <xs:element name="ScheduleOfReportableSegmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfReportableSegmentAbstract"/>
  <xs:element name="ScheduleOfSharesOfCommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfSharesOfCommonStockAbstract"/>
  <xs:element name="ScheduleOfCompanySWarrantIssuancesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfCompanySWarrantIssuancesAbstract"/>
  <xs:element name="ScheduleOfRevenueAndGrossProfitBySegmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfRevenueAndGrossProfitBySegmentAbstract"/>
  <xs:element name="ScheduleOfDisaggregatesRevenuesBySegmentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ScheduleOfDisaggregatesRevenuesBySegmentsAbstract"/>
  <xs:element name="AssetsAbstract0" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AssetsAbstract0"/>
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  <xs:element name="CurrentLiabilitiesAbstract0" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_CurrentLiabilitiesAbstract0"/>
  <xs:element name="PreferredStock000001ParValue20000000SharesAuthorizedAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_PreferredStock000001ParValue20000000SharesAuthorizedAbstract"/>
  <xs:element name="OperatingExpensesAbstract0" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_OperatingExpensesAbstract0"/>
  <xs:element name="OtherComprehensiveLossIncomeAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_OtherComprehensiveLossIncomeAbstract"/>
  <xs:element name="OtherComprehensiveIncomeLossAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_OtherComprehensiveIncomeLossAbstract"/>
  <xs:element name="SharesIssuedToForAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SharesIssuedToForAbstract"/>
  <xs:element name="SharesIssuedToForAbstract0" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SharesIssuedToForAbstract0"/>
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  <xs:element name="SharesIssuedToForAbstract2" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SharesIssuedToForAbstract2"/>
  <xs:element name="SharesIssuedToForAbstract3" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SharesIssuedToForAbstract3"/>
  <xs:element name="SharesIssuedToForAbstract4" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SharesIssuedToForAbstract4"/>
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  <xs:element name="FutureLeasePaymentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_FutureLeasePaymentsAbstract"/>
  <xs:element name="a2023Abstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_a2023Abstract"/>
  <xs:element name="CashPaidForAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_CashPaidForAbstract"/>
  <xs:element name="NonCashInvestingAndFinancingActivitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_NonCashInvestingAndFinancingActivitiesAbstract"/>
  <xs:element name="LossGainRecognizedOnHeldForSaleAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LossGainRecognizedOnHeldForSaleAbstract"/>
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  <xs:element name="InvestingActivitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_InvestingActivitiesAbstract"/>
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  <xs:element name="RedeemableSeriesHPreferredStockNetcurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_RedeemableSeriesHPreferredStockNetcurrent"/>
  <xs:element name="EarnoutLiabilitiesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_EarnoutLiabilitiesCurrent"/>
  <xs:element name="AccountsReceivableFinancingCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_AccountsReceivableFinancingCurrent"/>
  <xs:element name="RedeemableSeriesHPreferredStockNetNonCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_RedeemableSeriesHPreferredStockNetNonCurrent"/>
  <xs:element name="StockIssuedDuringPeriodSharesSharesIssuedToRelatedParty" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_StockIssuedDuringPeriodSharesSharesIssuedToRelatedParty"/>
  <xs:element name="StockIssuedDuringPeriodValueSharesIssuedToRelatedParty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_StockIssuedDuringPeriodValueSharesIssuedToRelatedParty"/>
  <xs:element name="AdjustmentsToAdditionalPaidInCapitalModificationOfWarrantsIssuedToRelatedParty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_AdjustmentsToAdditionalPaidInCapitalModificationOfWarrantsIssuedToRelatedParty"/>
  <xs:element name="AdjustmentsToAdditionalPaidInCapitalWarrantsModification" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_AdjustmentsToAdditionalPaidInCapitalWarrantsModification"/>
  <xs:element name="StockIssuedDuringPeriodSharesRetrospectiveEffectOfReverseStockSplit" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_StockIssuedDuringPeriodSharesRetrospectiveEffectOfReverseStockSplit"/>
  <xs:element name="StockIssuedDuringPeriodValueRetrospectiveEffectOfReverseStockSplit" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_StockIssuedDuringPeriodValueRetrospectiveEffectOfReverseStockSplit"/>
  <xs:element name="AdjustmentsToAdditionalPaidInCapitalModificationOfSeriesH" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_AdjustmentsToAdditionalPaidInCapitalModificationOfSeriesH"/>
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  <xs:element name="PaymentInKind" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_PaymentInKind"/>
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  <xs:element name="OrganizationandDescriptionofBusinessLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_OrganizationandDescriptionofBusinessLineItems"/>
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  <xs:element name="LossPerCommonShareLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LossPerCommonShareLineItems"/>
  <xs:element name="PropertyandEquipmentTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_PropertyandEquipmentTable"/>
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  <xs:element name="AcquisitionTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_AcquisitionTable"/>
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  <xs:element name="LeasesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LeasesLineItems"/>
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  <xs:element name="RelatedPartyTransactionsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_RelatedPartyTransactionsLineItems"/>
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  <xs:element name="IncomeTaxesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_IncomeTaxesLineItems"/>
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  <xs:element name="SubsequentEventsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SubsequentEventsLineItems"/>
  <xs:element name="AccountingPoliciesbyPolicyPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_AccountingPoliciesbyPolicyPoliciesTable"/>
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  <xs:element name="LiquidityPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LiquidityPolicyTextBlock"/>
  <xs:element name="SubstantialDoubtAboutGoingConcernPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SubstantialDoubtAboutGoingConcernPolicyTextBlock"/>
  <xs:element name="WarrantsPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_WarrantsPolicyTextBlock"/>
  <xs:element name="TreasuryStockMethodPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_TreasuryStockMethodPolicyTextBlock"/>
  <xs:element name="GoingConcernPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_GoingConcernPolicyTextBlock"/>
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  <xs:element name="BusinessCombinationDeferredConsiderationAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_BusinessCombinationDeferredConsiderationAmount"/>
  <xs:element name="BusinessCombinationEarnoutAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_BusinessCombinationEarnoutAmount"/>
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  <xs:element name="CollateralAssociatedWithWorkersCompensationInsuranceNoncurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_CollateralAssociatedWithWorkersCompensationInsuranceNoncurrent"/>
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  <xs:element name="GoodwillAccumulatedDisposition" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_GoodwillAccumulatedDisposition"/>
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  <xs:element name="AccountsPayableandAccruedExpensesScheduleofAccountsPayableandAccruedExpensesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AccountsPayableandAccruedExpensesScheduleofAccountsPayableandAccruedExpensesDetailsLineItems"/>
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  <xs:element name="AccruedTaxesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_AccruedTaxesPayable"/>
  <xs:element name="InterestOnPayrollTaxesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_InterestOnPayrollTaxesPayable"/>
  <xs:element name="PenaltiesOnPayrollTaxesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_PenaltiesOnPayrollTaxesPayable"/>
  <xs:element name="AcquisitionScheduleofBusinessAcquisitionPurchasePriceFairValueDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_AcquisitionScheduleofBusinessAcquisitionPurchasePriceFairValueDetailsTable"/>
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  <xs:element name="LongTermDebtNoncurrentPortionRelatedParty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_LongTermDebtNoncurrentPortionRelatedParty"/>
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  <xs:element name="LeasesScheduleofOperatingLeaseLiabilityMaturityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_LeasesScheduleofOperatingLeaseLiabilityMaturityDetailsTable"/>
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  <xs:element name="StockholdersDeficitEquityScheduleofSharesCommonStockDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitEquityScheduleofSharesCommonStockDetailsTable"/>
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  <xs:element name="StockholdersDeficitEquityScheduleofUnvestedRestrictedSharesIssuedtoEmployeesandBoardofDirectorsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitEquityScheduleofUnvestedRestrictedSharesIssuedtoEmployeesandBoardofDirectorsDetailsTable"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantedWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantedWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisedWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisedWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisedWeightedAverageExpiredPrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisedWeightedAverageExpiredPrice"/>
  <xs:element name="ClassOfWarrantOrRightOutstandingAndExercisable" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_ClassOfWarrantOrRightOutstandingAndExercisable"/>
  <xs:element name="StockholdersDeficitEquityScheduleofOptionActivityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitEquityScheduleofOptionActivityDetailsTable"/>
  <xs:element name="InterestExpenseAndAmortizationOfDebtDiscountAndDeferredFinancingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_InterestExpenseAndAmortizationOfDebtDiscountAndDeferredFinancingCosts"/>
  <xs:element name="GainLossOnDiscontinuedOperation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_GainLossOnDiscontinuedOperation"/>
  <xs:element name="ConsultingFeesRelatedParties" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_ConsultingFeesRelatedParties"/>
  <xs:element name="SupplementalCashFlowInformationScheduleofSupplementalCashFlowInformationDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_SupplementalCashFlowInformationScheduleofSupplementalCashFlowInformationDetailsTable"/>
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  <xs:element name="SupplementalRedeemablePreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalRedeemablePreferredStock"/>
  <xs:element name="SupplementalDebtDiscountSeriesHPreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalDebtDiscountSeriesHPreferredStock"/>
  <xs:element name="SupplementalDebtDiscountRelatedPartyNote" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalDebtDiscountRelatedPartyNote"/>
  <xs:element name="AcquisitionOfRightOfUseAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_AcquisitionOfRightOfUseAssets"/>
  <xs:element name="SupplementalEarnoutLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalEarnoutLiability"/>
  <xs:element name="SupplementalGoodwill" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalGoodwill"/>
  <xs:element name="SupplementalIntangibleAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalIntangibleAssets"/>
  <xs:element name="SupplementalWarrantModification" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalWarrantModification"/>
  <xs:element name="IncomeTaxesScheduleofComponentsofLossIncomeBeforeProvisionforIncomeTaxesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IncomeTaxesScheduleofComponentsofLossIncomeBeforeProvisionforIncomeTaxesDetailsTable"/>
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  <xs:element name="IncomeTaxesScheduleofComponentsofBenefitforIncomeTaxesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IncomeTaxesScheduleofComponentsofBenefitforIncomeTaxesDetailsTable"/>
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  <xs:element name="IncomeTaxReconciliationGoodwillImpairment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_IncomeTaxReconciliationGoodwillImpairment"/>
  <xs:element name="EffectiveIncomeTaxRateReconciliationusGoodwillImpairment" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_EffectiveIncomeTaxRateReconciliationusGoodwillImpairment"/>
  <xs:element name="IncomeTaxReconciliationOtherAdjustmentsOne" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_IncomeTaxReconciliationOtherAdjustmentsOne"/>
  <xs:element name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsOne" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsOne"/>
  <xs:element name="IncomeTaxReconciliationOtherAdjustmentsTwo" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_IncomeTaxReconciliationOtherAdjustmentsTwo"/>
  <xs:element name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsTwo" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsTwo"/>
  <xs:element name="IncomeTaxesScheduleofDeferredTaxAssetsLiabilitiesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IncomeTaxesScheduleofDeferredTaxAssetsLiabilitiesDetailsTable"/>
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  <xs:element name="DeferredTaxAssetsDebtIssuanceCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxAssetsDebtIssuanceCosts"/>
  <xs:element name="DeferredTaxAssetsOperatingLeaseLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxAssetsOperatingLeaseLiabilities"/>
  <xs:element name="DeferredTaxLiabilitiesPropertyPlantAndEquipmentDeprecation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxLiabilitiesPropertyPlantAndEquipmentDeprecation"/>
  <xs:element name="DeferredTaxLiabilitiesAcquiredIntangibleAssetsIntangibleAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxLiabilitiesAcquiredIntangibleAssetsIntangibleAssets"/>
  <xs:element name="DeferredTaxLiabilitiesDebtIssuanceCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxLiabilitiesDebtIssuanceCosts"/>
  <xs:element name="DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets"/>
  <xs:element name="IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsTable"/>
  <xs:element name="IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsLineItems"/>
  <xs:element name="UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions1" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions1"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationsPrepaidExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_DisposalGroupIncludingDiscontinuedOperationsPrepaidExpenses"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationsDeposits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_DisposalGroupIncludingDiscontinuedOperationsDeposits"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationPurchaseOfPropertyAndEquipment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_DisposalGroupIncludingDiscontinuedOperationPurchaseOfPropertyAndEquipment"/>
  <xs:element name="IntangibleAssetsScheduleofEstimatedAnnualAmortizationExpenseDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IntangibleAssetsScheduleofEstimatedAnnualAmortizationExpenseDetailsTable"/>
  <xs:element name="IntangibleAssetsScheduleofEstimatedAnnualAmortizationExpenseDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_IntangibleAssetsScheduleofEstimatedAnnualAmortizationExpenseDetailsLineItems"/>
  <xs:element name="GoodwillScheduleofReportableSegmentDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_GoodwillScheduleofReportableSegmentDetailsTable"/>
  <xs:element name="LeasesScheduleofLeaseCostandOperatingLeaseLiabilityMaturityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_LeasesScheduleofLeaseCostandOperatingLeaseLiabilityMaturityDetailsTable"/>
  <xs:element name="LeasesScheduleofLeaseCostandOperatingLeaseLiabilityMaturityDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LeasesScheduleofLeaseCostandOperatingLeaseLiabilityMaturityDetailsLineItems"/>
  <xs:element name="LeasesScheduleofFutureMinimumLeasePaymentsUnderNonCancelableLeasesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_LeasesScheduleofFutureMinimumLeasePaymentsUnderNonCancelableLeasesDetailsTable"/>
  <xs:element name="LeasesScheduleofFutureMinimumLeasePaymentsUnderNonCancelableLeasesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LeasesScheduleofFutureMinimumLeasePaymentsUnderNonCancelableLeasesDetailsLineItems"/>
  <xs:element name="StockholdersDeficitScheduleofSharesofCommonStockDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitScheduleofSharesofCommonStockDetailsTable"/>
  <xs:element name="StockholdersDeficitScheduleofUnvestedRestrictedSharesIssuedDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitScheduleofUnvestedRestrictedSharesIssuedDetailsTable"/>
  <xs:element name="StockholdersDeficitScheduleofUnvestedRestrictedSharesIssuedDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_StockholdersDeficitScheduleofUnvestedRestrictedSharesIssuedDetailsLineItems"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisesInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExpirationsInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExpirationsInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="StockholdersDeficitScheduleofOptionActivityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitScheduleofOptionActivityDetailsTable"/>
  <xs:element name="DiscontinuedOperations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_DiscontinuedOperations"/>
  <xs:element name="SupplementalRedeemablePreferredStockPaymenInKind" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalRedeemablePreferredStockPaymenInKind"/>
  <xs:element name="SupplementalModificationOfPreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalModificationOfPreferredStock"/>
  <xs:element name="SupplementalDebtDiscount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_SupplementalDebtDiscount"/>
  <xs:element name="OrganizationandDescriptionofBusinessDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_OrganizationandDescriptionofBusinessDetailsTable"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_SummaryofSignificantAccountingPoliciesDetailsTable"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SummaryofSignificantAccountingPoliciesDetailsLineItems"/>
  <xs:element name="WorkingCapitalDeficit" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_WorkingCapitalDeficit"/>
  <xs:element name="GoodwillImpairmentLosses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_GoodwillImpairmentLosses"/>
  <xs:element name="PropertyandEquipmentDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_PropertyandEquipmentDetailsTable"/>
  <xs:element name="PropertyandEquipmentDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_PropertyandEquipmentDetailsLineItems"/>
  <xs:element name="IntangibleAssetsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IntangibleAssetsDetailsTable"/>
  <xs:element name="IntangibleAssetsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_IntangibleAssetsDetailsLineItems"/>
  <xs:element name="GoodwillDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_GoodwillDetailsTable"/>
  <xs:element name="GoodwillDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_GoodwillDetailsLineItems"/>
  <xs:element name="AccountsReceivableFinancingDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_AccountsReceivableFinancingDetailsTable"/>
  <xs:element name="AccountsReceivableFinancingDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AccountsReceivableFinancingDetailsLineItems"/>
  <xs:element name="GuaranteedAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_GuaranteedAmount"/>
  <xs:element name="LetterOfCreditMonthlyInterestRate" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_LetterOfCreditMonthlyInterestRate"/>
  <xs:element name="BorrowingFundDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_BorrowingFundDescription"/>
  <xs:element name="LineOfCreditFacilityUnbilledReceivables" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_LineOfCreditFacilityUnbilledReceivables"/>
  <xs:element name="CollectionOfUkFactoringFacilityDeferredPurchasePriceNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_CollectionOfUkFactoringFacilityDeferredPurchasePriceNet"/>
  <xs:element name="LineOfCreditFacilityAdditionalBorrowingCapacity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_LineOfCreditFacilityAdditionalBorrowingCapacity"/>
  <xs:element name="ModificationFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_ModificationFee"/>
  <xs:element name="AccountsReceivableAdditionalReserve" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_AccountsReceivableAdditionalReserve"/>
  <xs:element name="AccountsReceivableAggregateAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_AccountsReceivableAggregateAmount"/>
  <xs:element name="AcquisitionDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_AcquisitionDetailsTable"/>
  <xs:element name="AcquisitionDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AcquisitionDetailsLineItems"/>
  <xs:element name="DebtDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_DebtDetailsTable"/>
  <xs:element name="DebtDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_DebtDetailsLineItems"/>
  <xs:element name="AmendmentFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_AmendmentFee"/>
  <xs:element name="PercentageOfOutstandingPrincipalBalance" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_PercentageOfOutstandingPrincipalBalance"/>
  <xs:element name="PercentageOfFirstCallOverOfNetProceedsFromIncreaseOfCommonStock" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_PercentageOfFirstCallOverOfNetProceedsFromIncreaseOfCommonStock"/>
  <xs:element name="DebtInstrumentIssuanceAggregateShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_DebtInstrumentIssuanceAggregateShares"/>
  <xs:element name="AggregateAgreedAmountForRedemptionOfPreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_AggregateAgreedAmountForRedemptionOfPreferredStock"/>
  <xs:element name="NumberOfSharesIssuedAndOutstanding" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_NumberOfSharesIssuedAndOutstanding"/>
  <xs:element name="PaymentToThirdPartiesToSatisfyExistingIncentivesAndFeesDue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_PaymentToThirdPartiesToSatisfyExistingIncentivesAndFeesDue"/>
  <xs:element name="ContingentPaymentAmountAsPerAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_ContingentPaymentAmountAsPerAgreement"/>
  <xs:element name="ContingentPaymentInstallmentAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_ContingentPaymentInstallmentAmount"/>
  <xs:element name="InstallmentAmountToBePaidToThirdParties" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_InstallmentAmountToBePaidToThirdParties"/>
  <xs:element name="NumberOfAdditionalSharesRedeem" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_NumberOfAdditionalSharesRedeem"/>
  <xs:element name="LeasesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_LeasesDetailsTable"/>
  <xs:element name="IncreaseDecreaseInOperatingLeaseLiabilityRightOfUseAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_IncreaseDecreaseInOperatingLeaseLiabilityRightOfUseAssets"/>
  <xs:element name="StockholdersDeficitEquityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_StockholdersDeficitEquityDetailsTable"/>
  <xs:element name="StockholdersDeficitEquityDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_StockholdersDeficitEquityDetailsLineItems"/>
  <xs:element name="CapitalStockSharesAuthorized" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_CapitalStockSharesAuthorized"/>
  <xs:element name="ReducedExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_ReducedExercisePrice"/>
  <xs:element name="ExerciseOfWarrantsPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ExerciseOfWarrantsPercentage"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfRestrictedShare" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfRestrictedShare"/>
  <xs:element name="UnitsVestingUponEmployeesBeingInGoodStandingPercentages" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_UnitsVestingUponEmployeesBeingInGoodStandingPercentages"/>
  <xs:element name="UnitsVestingUponAverageSharePricePercentages" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_UnitsVestingUponAverageSharePricePercentages"/>
  <xs:element name="PublicOfferingPrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_PublicOfferingPrice"/>
  <xs:element name="PercentageOfWarrants" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_PercentageOfWarrants"/>
  <xs:element name="PercentageOfCommonStockOutstanding" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_PercentageOfCommonStockOutstanding"/>
  <xs:element name="CashFeePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_CashFeePercentage"/>
  <xs:element name="ManagementFeePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_ManagementFeePercentage"/>
  <xs:element name="SharesOfPreferredStockVotes" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_SharesOfPreferredStockVotes"/>
  <xs:element name="PurchasePricePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_PurchasePricePercentage"/>
  <xs:element name="CommitmentsandContingenciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_CommitmentsandContingenciesDetailsTable"/>
  <xs:element name="EmploymentAgreementOfficerCompensationBonusPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_EmploymentAgreementOfficerCompensationBonusPercentage"/>
  <xs:element name="PercentageOfAnnualBaseSalary" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_PercentageOfAnnualBaseSalary"/>
  <xs:element name="EntitleToReceiveSeverancePayPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_EntitleToReceiveSeverancePayPeriod"/>
  <xs:element name="BusinessCombinationEarnoutConsiderationInterestPayment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_BusinessCombinationEarnoutConsiderationInterestPayment"/>
  <xs:element name="FinalSettlementPlusInterest" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_FinalSettlementPlusInterest"/>
  <xs:element name="BusinessCombinationContingentPaymentThresholdAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_BusinessCombinationContingentPaymentThresholdAmount"/>
  <xs:element name="BusinessCombinationConsiderationTransferredRemaining" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="altn_BusinessCombinationConsiderationTransferredRemaining"/>
  <xs:element name="IncomeTaxesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_IncomeTaxesDetailsTable"/>
  <xs:element name="OperatingLossCarryforwardsExpirationBeginningYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_OperatingLossCarryforwardsExpirationBeginningYear"/>
  <xs:element name="OperatingLossCarryforwardsDecrease" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_OperatingLossCarryforwardsDecrease"/>
  <xs:element name="DeferredTaxAssetsCapitalLossCarryforwardsExpirationBeginningYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_DeferredTaxAssetsCapitalLossCarryforwardsExpirationBeginningYear"/>
  <xs:element name="DisallowedInterestLimitation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="altn_DisallowedInterestLimitation"/>
  <xs:element name="DiscontinuedOperationsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_DiscontinuedOperationsDetailsTable"/>
  <xs:element name="DiscontinuedOperationsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_DiscontinuedOperationsDetailsLineItems"/>
  <xs:element name="SubsequentEventsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="altn_SubsequentEventsDetailsTable"/>
  <xs:element name="MinimumBidPricePerShare" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="altn_MinimumBidPricePerShare"/>
  <xs:element name="AcquiringPersonMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AcquiringPersonMember"/>
  <xs:element name="AliciaBarkerMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AliciaBarkerMember"/>
  <xs:element name="AmendedNotePurchaseAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AmendedNotePurchaseAgreementMember"/>
  <xs:element name="AmendmentAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AmendmentAgreementMember"/>
  <xs:element name="AmendmentNoThirtyMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AmendmentNoThirtyMember"/>
  <xs:element name="AmendmentNoThirtyOneMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AmendmentNoThirtyOneMember"/>
  <xs:element name="AprilTwentyTwentyOneSecuritiesPurchaseAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AprilTwentyTwentyOneSecuritiesPurchaseAgreementMember"/>
  <xs:element name="AtlanticInternationalCorpMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="altn_AtlanticInternationalCorpMember"/>
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</xs:schema>
