<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:f8022fb9-ecc1-441a-8e8c-6deeed5c5fe8,g:50dacbe7-6175-448f-9d69-a060bb3c53c4-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.digi.com/role/CondensedConsolidatedStatementsofOperationsUnaudited" xlink:type="simple" xlink:href="dgii-20250630.xsd#CondensedConsolidatedStatementsofOperationsUnaudited"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/CondensedConsolidatedStatementsofOperationsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_15371f6f-aec5-4c6a-9089-1dba57246086" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_87b070b7-c484-4699-9b66-ddb603f3a27c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_15371f6f-aec5-4c6a-9089-1dba57246086" xlink:to="loc_us-gaap_GrossProfit_87b070b7-c484-4699-9b66-ddb603f3a27c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_d9cef66e-4f4a-4251-88a0-67b63d9ccf2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_15371f6f-aec5-4c6a-9089-1dba57246086" xlink:to="loc_us-gaap_OperatingExpenses_d9cef66e-4f4a-4251-88a0-67b63d9ccf2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_57c6c9d4-d109-4805-aec0-23546a9f1607" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_dgii_OtherIncomeNet_21b7455e-bdcc-403f-9ef6-669c48bd96f2" xlink:href="dgii-20250630.xsd#dgii_OtherIncomeNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_57c6c9d4-d109-4805-aec0-23546a9f1607" xlink:to="loc_dgii_OtherIncomeNet_21b7455e-bdcc-403f-9ef6-669c48bd96f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_f339645e-cdee-4905-b4fc-5086407ae5ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_57c6c9d4-d109-4805-aec0-23546a9f1607" xlink:to="loc_us-gaap_OperatingIncomeLoss_f339645e-cdee-4905-b4fc-5086407ae5ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_956d1732-cc09-4f58-b598-9afca435de7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_3880ba1d-22e0-4f50-a8e5-e520d3f0a5b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_956d1732-cc09-4f58-b598-9afca435de7f" xlink:to="loc_us-gaap_Revenues_3880ba1d-22e0-4f50-a8e5-e520d3f0a5b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_38c15230-b3ab-48b6-ad03-f891d9a51698" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_956d1732-cc09-4f58-b598-9afca435de7f" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_38c15230-b3ab-48b6-ad03-f891d9a51698" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_3fa7b92b-fc87-4f46-aad3-094c7857a2ad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_8206bf9e-7134-47a6-8394-43a376b4e347" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_3fa7b92b-fc87-4f46-aad3-094c7857a2ad" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_8206bf9e-7134-47a6-8394-43a376b4e347" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_a200e049-c288-46c3-8b3d-1fc47291bee3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_3fa7b92b-fc87-4f46-aad3-094c7857a2ad" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_a200e049-c288-46c3-8b3d-1fc47291bee3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_dgii_OtherIncomeNet_9f3e160f-eb29-44e1-b258-fd803d68cbf7" xlink:href="dgii-20250630.xsd#dgii_OtherIncomeNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_7fca2f6f-f729-4d8a-b588-1073d47bd194" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dgii_OtherIncomeNet_9f3e160f-eb29-44e1-b258-fd803d68cbf7" xlink:to="loc_us-gaap_InterestExpenseNonoperating_7fca2f6f-f729-4d8a-b588-1073d47bd194" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_eeed1a27-3720-4f0a-abcc-c4e453fde121" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dgii_OtherIncomeNet_9f3e160f-eb29-44e1-b258-fd803d68cbf7" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_eeed1a27-3720-4f0a-abcc-c4e453fde121" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_66cd0503-568d-4671-a521-4d23fef2da0a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dgii_OtherIncomeNet_9f3e160f-eb29-44e1-b258-fd803d68cbf7" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_66cd0503-568d-4671-a521-4d23fef2da0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_858b68d9-024c-414d-9700-30cf26abbd2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_8fa1b018-8875-4ee1-834c-a3c4a50e065c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_858b68d9-024c-414d-9700-30cf26abbd2e" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_8fa1b018-8875-4ee1-834c-a3c4a50e065c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_27be3040-c142-4f8e-9173-a76e96e16046" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_858b68d9-024c-414d-9700-30cf26abbd2e" xlink:to="loc_us-gaap_SellingAndMarketingExpense_27be3040-c142-4f8e-9173-a76e96e16046" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_d2330e1b-9cda-4df3-8df8-22a5ff2ca768" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_858b68d9-024c-414d-9700-30cf26abbd2e" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_d2330e1b-9cda-4df3-8df8-22a5ff2ca768" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_507e4cc0-ebc8-4cf6-b36a-c0f967791a93" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_83ae295b-431f-44ba-a9ec-1dd50c8ec998" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_507e4cc0-ebc8-4cf6-b36a-c0f967791a93" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_83ae295b-431f-44ba-a9ec-1dd50c8ec998" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_121b2c3d-7872-4431-8637-f6fb108ba8b8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAmortization_6fe9dfde-6c1e-4b45-9c38-09f73aba1c3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSoldAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSold_121b2c3d-7872-4431-8637-f6fb108ba8b8" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAmortization_6fe9dfde-6c1e-4b45-9c38-09f73aba1c3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_dgii_CostOfGoodsAndServicesSoldExcludingAmortization_6953b6fd-afe2-4533-9447-b789702f30d0" xlink:href="dgii-20250630.xsd#dgii_CostOfGoodsAndServicesSoldExcludingAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSold_121b2c3d-7872-4431-8637-f6fb108ba8b8" xlink:to="loc_dgii_CostOfGoodsAndServicesSoldExcludingAmortization_6953b6fd-afe2-4533-9447-b789702f30d0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited" xlink:type="simple" xlink:href="dgii-20250630.xsd#CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_f2c1bf6f-0061-4890-89b8-62f1c27a2c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_50240273-6024-4b9d-978e-6c3150830c77" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_f2c1bf6f-0061-4890-89b8-62f1c27a2c7a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_50240273-6024-4b9d-978e-6c3150830c77" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_e19f32f7-e95f-4c9e-aa92-57f4e1757e66" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_f90d9c7f-e398-4cdd-818f-404eb2d556d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_e19f32f7-e95f-4c9e-aa92-57f4e1757e66" xlink:to="loc_us-gaap_NetIncomeLoss_f90d9c7f-e398-4cdd-818f-404eb2d556d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_7a4ffa8e-57f4-4c85-a0ae-3cdadb79bf49" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_e19f32f7-e95f-4c9e-aa92-57f4e1757e66" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_7a4ffa8e-57f4-4c85-a0ae-3cdadb79bf49" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="dgii-20250630.xsd#CondensedConsolidatedBalanceSheetsUnaudited"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c35c361-3561-404b-887d-8033209ca48c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ba80217e-99d6-4aee-8fdd-8b39927038e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c35c361-3561-404b-887d-8033209ca48c" xlink:to="loc_us-gaap_StockholdersEquity_ba80217e-99d6-4aee-8fdd-8b39927038e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_65c05157-9bbd-4980-961c-2334cf2fa6db" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c35c361-3561-404b-887d-8033209ca48c" xlink:to="loc_us-gaap_Liabilities_65c05157-9bbd-4980-961c-2334cf2fa6db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_1cdc501b-bcba-4851-aacd-08c2b1de28c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_77cf42fa-ac7d-4bd8-a4e7-228d85a06a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1cdc501b-bcba-4851-aacd-08c2b1de28c3" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_77cf42fa-ac7d-4bd8-a4e7-228d85a06a8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_6fbcf704-fd6a-4118-bff6-c169d67373f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1cdc501b-bcba-4851-aacd-08c2b1de28c3" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_6fbcf704-fd6a-4118-bff6-c169d67373f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReceivable_c01a30e9-bfe9-4beb-b5fc-e0c2b85c2485" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReceivable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1cdc501b-bcba-4851-aacd-08c2b1de28c3" xlink:to="loc_us-gaap_IncomeTaxReceivable_c01a30e9-bfe9-4beb-b5fc-e0c2b85c2485" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_b271e08e-b0a9-41db-b5b7-38d6f5c4a69e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1cdc501b-bcba-4851-aacd-08c2b1de28c3" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_b271e08e-b0a9-41db-b5b7-38d6f5c4a69e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_2061785d-86d2-43c8-b5fd-4204f7d9ccb7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1cdc501b-bcba-4851-aacd-08c2b1de28c3" xlink:to="loc_us-gaap_InventoryNet_2061785d-86d2-43c8-b5fd-4204f7d9ccb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_539bd1e2-e46e-4c20-b897-72f5581da8f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_539bd1e2-e46e-4c20-b897-72f5581da8f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_db97e25f-ce8e-4b14-85fc-bb41b893c1d4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:to="loc_us-gaap_TreasuryStockValue_db97e25f-ce8e-4b14-85fc-bb41b893c1d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a0defce3-2233-48e6-9683-a017d287d489" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a0defce3-2233-48e6-9683-a017d287d489" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_5d069362-0a05-46e9-b328-41c57a67f9a8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:to="loc_us-gaap_CommonStockValue_5d069362-0a05-46e9-b328-41c57a67f9a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_c1669d78-5a76-46c8-b2ec-a80db3050a79" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:to="loc_us-gaap_PreferredStockValue_c1669d78-5a76-46c8-b2ec-a80db3050a79" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_61250fef-d310-46d2-ac97-3deb674de27a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_52624e8b-a882-440a-888a-e9c667dad336" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_61250fef-d310-46d2-ac97-3deb674de27a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_2818c650-95ac-4527-8d68-9e21dac406eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_2818c650-95ac-4527-8d68-9e21dac406eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_89beaa3d-9ac4-4586-91f3-6d9c9fadd1f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_89beaa3d-9ac4-4586-91f3-6d9c9fadd1f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_343ca47a-156d-43b9-89b8-1ac33852f41b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:to="loc_us-gaap_AccountsPayableCurrent_343ca47a-156d-43b9-89b8-1ac33852f41b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_e7aa283c-38db-4241-90d6-4152503b824a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_e7aa283c-38db-4241-90d6-4152503b824a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_760dec59-6f7d-4d57-9c0a-0c45db73c903" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_760dec59-6f7d-4d57-9c0a-0c45db73c903" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_dde601bb-6d8d-4b19-af22-71bcfcae0d57" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_8a1bff9a-630c-480d-bdac-456b4a952ff2" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_dde601bb-6d8d-4b19-af22-71bcfcae0d57" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_8fbd410e-c84d-4f89-b6cf-ae1b0d698d7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:to="loc_us-gaap_LiabilitiesCurrent_8fbd410e-c84d-4f89-b6cf-ae1b0d698d7f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_14d2bf30-b48f-43ae-85c9-c1dd7c7a8f92" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedIncomeTaxesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_14d2bf30-b48f-43ae-85c9-c1dd7c7a8f92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_60e39796-de3a-47c7-8e5d-608abc339ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_60e39796-de3a-47c7-8e5d-608abc339ed3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_74b04cc0-5da0-4bd1-93e5-643a7fcff011" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:to="loc_us-gaap_LongTermDebt_74b04cc0-5da0-4bd1-93e5-643a7fcff011" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_f04c9f3a-b823-407d-b728-3ccb52e351e2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_f04c9f3a-b823-407d-b728-3ccb52e351e2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_6aadd238-c72a-4f14-bcd0-440d87db8732" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_0c670f2e-e1f3-43dd-9979-0007d09a7de8" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_6aadd238-c72a-4f14-bcd0-440d87db8732" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpense_666f9924-eabb-4fb1-b698-37895dd55890" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpense_666f9924-eabb-4fb1-b698-37895dd55890" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_bc4128e1-f2f4-45f3-85a6-32be7707b847" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_Goodwill_bc4128e1-f2f4-45f3-85a6-32be7707b847" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_16a31f7a-55b0-49ab-848f-337c1b2483b8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_AssetsCurrent_16a31f7a-55b0-49ab-848f-337c1b2483b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_0175db06-4019-4f05-9e3b-19c83a72effb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_0175db06-4019-4f05-9e3b-19c83a72effb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_f3f2269f-640f-4b4f-b716-712d94202907" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_f3f2269f-640f-4b4f-b716-712d94202907" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_a99da80d-c59f-4d4e-921b-5fa1615de0e1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_a99da80d-c59f-4d4e-921b-5fa1615de0e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_6d130bcb-f035-4337-b9a9-4eb30df09882" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_7b070d6e-facf-496f-9153-1f01a2aa848a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_6d130bcb-f035-4337-b9a9-4eb30df09882" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="dgii-20250630.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3d70b4b9-2b54-44e6-95ec-ff4a57a2b2dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfIntangibleAssets_949072ae-039b-441a-ac35-ebcb3235023d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromSaleOfIntangibleAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3d70b4b9-2b54-44e6-95ec-ff4a57a2b2dd" xlink:to="loc_us-gaap_ProceedsFromSaleOfIntangibleAssets_949072ae-039b-441a-ac35-ebcb3235023d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_2b09d749-0002-42dd-b770-dd1ed6d9b22c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3d70b4b9-2b54-44e6-95ec-ff4a57a2b2dd" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_2b09d749-0002-42dd-b770-dd1ed6d9b22c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d6671ba-e51b-4bfe-ae43-89ce0c224b0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_52f58051-4bd4-466e-8f36-273ff69399d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d6671ba-e51b-4bfe-ae43-89ce0c224b0e" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_52f58051-4bd4-466e-8f36-273ff69399d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_3a99fae0-3f85-44ac-a19e-e38585ff124e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d6671ba-e51b-4bfe-ae43-89ce0c224b0e" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_3a99fae0-3f85-44ac-a19e-e38585ff124e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockPlans_f8a4423f-808f-49f4-966d-f4c5bfffd6fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromStockPlans"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d6671ba-e51b-4bfe-ae43-89ce0c224b0e" xlink:to="loc_us-gaap_ProceedsFromStockPlans_f8a4423f-808f-49f4-966d-f4c5bfffd6fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_331191bc-80ba-4362-94cf-d5b79ca3ff0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d6671ba-e51b-4bfe-ae43-89ce0c224b0e" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_331191bc-80ba-4362-94cf-d5b79ca3ff0d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_4cc0b21a-ef47-4530-9643-695836a51f96" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6d6671ba-e51b-4bfe-ae43-89ce0c224b0e" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_4cc0b21a-ef47-4530-9643-695836a51f96" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_8f8accfa-ea78-44bb-92a8-cd6ce5dcdc66" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_8f8accfa-ea78-44bb-92a8-cd6ce5dcdc66" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentForAmortization_5b20dc31-7b8a-44ac-b527-b27298674227" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentForAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_AdjustmentForAmortization_5b20dc31-7b8a-44ac-b527-b27298674227" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapital_f8b95c1d-eeec-4a87-8063-35c70addef7b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOperatingCapital"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapital_f8b95c1d-eeec-4a87-8063-35c70addef7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_0833a368-30e9-4c2c-9f68-bce9f22c9eda" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_NetIncomeLoss_0833a368-30e9-4c2c-9f68-bce9f22c9eda" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementExpense_8947bb71-a820-491d-bcf2-a73d875fbf6e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LitigationSettlementExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_LitigationSettlementExpense_8947bb71-a820-491d-bcf2-a73d875fbf6e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_97da5c86-9ceb-42d8-9c72-d84e3e1f0b0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_ShareBasedCompensation_97da5c86-9ceb-42d8-9c72-d84e3e1f0b0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_486d0624-6ac4-4373-af52-3c357e9cd224" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Depreciation"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_Depreciation_486d0624-6ac4-4373-af52-3c357e9cd224" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_94104abb-4770-45dd-8d58-c7b3902e90fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_94104abb-4770-45dd-8d58-c7b3902e90fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_77ab8c15-651e-4501-97ab-35d794ed2d8d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3686f8f5-7f75-419e-abd5-c98324347416" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_77ab8c15-651e-4501-97ab-35d794ed2d8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_cf6386d2-6807-434a-8754-a25ffb215cfd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_057b4777-d44d-410f-987a-a224d4de3b91" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_cf6386d2-6807-434a-8754-a25ffb215cfd" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_057b4777-d44d-410f-987a-a224d4de3b91" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_37153bd7-1f7d-4439-9929-3be2a02fa319" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_cf6386d2-6807-434a-8754-a25ffb215cfd" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_37153bd7-1f7d-4439-9929-3be2a02fa319" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c13a223e-39ab-49c4-9036-2c2b5ca2fd3b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_cf6386d2-6807-434a-8754-a25ffb215cfd" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c13a223e-39ab-49c4-9036-2c2b5ca2fd3b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_190498f8-5e6a-4575-afa9-239ee5fbba36" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_cf6386d2-6807-434a-8754-a25ffb215cfd" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_190498f8-5e6a-4575-afa9-239ee5fbba36" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#EarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_a5f66840-7bb8-462d-a08e-bb93bcce4d56" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_a8d70838-8d09-4e06-8bc7-35be31877869" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_a5f66840-7bb8-462d-a08e-bb93bcce4d56" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_a8d70838-8d09-4e06-8bc7-35be31877869" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_ee347336-ecbc-476b-9dda-8de35606475a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_a5f66840-7bb8-462d-a08e-bb93bcce4d56" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_ee347336-ecbc-476b-9dda-8de35606475a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/SelectedBalanceSheetDataDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#SelectedBalanceSheetDataDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/SelectedBalanceSheetDataDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_93297949-b246-4607-8fac-c5a30a9b6a50" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_57b28060-55d9-4629-854e-e096e6558800" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_93297949-b246-4607-8fac-c5a30a9b6a50" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_57b28060-55d9-4629-854e-e096e6558800" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_4e1f111b-85f5-43de-a1f7-02a3e211a6f8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_93297949-b246-4607-8fac-c5a30a9b6a50" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_4e1f111b-85f5-43de-a1f7-02a3e211a6f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_60df37a8-2f3d-4043-ba8f-2c5f5082d058" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_93297949-b246-4607-8fac-c5a30a9b6a50" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_60df37a8-2f3d-4043-ba8f-2c5f5082d058" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_034f2e7c-fa6e-4900-9137-52aefcc5f10c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_723a1b41-f411-4edd-9396-b03db75a0741" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_034f2e7c-fa6e-4900-9137-52aefcc5f10c" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_723a1b41-f411-4edd-9396-b03db75a0741" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_978e0397-4fda-42dc-a110-01bbb3a8a10d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_034f2e7c-fa6e-4900-9137-52aefcc5f10c" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_978e0397-4fda-42dc-a110-01bbb3a8a10d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_dgii_AllowanceforFutureReturnsandPricingAdjustments_6eb062f4-2a90-431a-b174-0988496741bb" xlink:href="dgii-20250630.xsd#dgii_AllowanceforFutureReturnsandPricingAdjustments"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_034f2e7c-fa6e-4900-9137-52aefcc5f10c" xlink:to="loc_dgii_AllowanceforFutureReturnsandPricingAdjustments_6eb062f4-2a90-431a-b174-0988496741bb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/GoodwillandOtherIdentifiableIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#GoodwillandOtherIdentifiableIntangibleAssetsNetDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/GoodwillandOtherIdentifiableIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2fdcb698-62da-4f91-8efa-c6151a9455ad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_db0b1ae7-e5f7-46d6-bc26-6b063c21f59d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2fdcb698-62da-4f91-8efa-c6151a9455ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_db0b1ae7-e5f7-46d6-bc26-6b063c21f59d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c6990371-7a39-4327-b77f-461d24cd970a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2fdcb698-62da-4f91-8efa-c6151a9455ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c6990371-7a39-4327-b77f-461d24cd970a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/LeasesSupplementalBalanceSheetDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#LeasesSupplementalBalanceSheetDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/LeasesSupplementalBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dgii_LeaseLiability_f8f91875-4fec-47d3-b5d9-18359a8683e9" xlink:href="dgii-20250630.xsd#dgii_LeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_e5ef758a-fd73-4e80-9e39-70389ded45fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dgii_LeaseLiability_f8f91875-4fec-47d3-b5d9-18359a8683e9" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_e5ef758a-fd73-4e80-9e39-70389ded45fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_f477a99c-dfb0-4fb3-a5b5-11c7fd5d6dd4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dgii_LeaseLiability_f8f91875-4fec-47d3-b5d9-18359a8683e9" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_f477a99c-dfb0-4fb3-a5b5-11c7fd5d6dd4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_dgii_LeaseRightOfUseAsset_1cd3b524-d44a-4f3d-8ef7-6160f1fbb18c" xlink:href="dgii-20250630.xsd#dgii_LeaseRightOfUseAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_dd81b9f4-a94b-4e19-a1ae-7e5c3c083fa0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dgii_LeaseRightOfUseAsset_1cd3b524-d44a-4f3d-8ef7-6160f1fbb18c" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_dd81b9f4-a94b-4e19-a1ae-7e5c3c083fa0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/LeasesLeaseCostDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#LeasesLeaseCostDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/LeasesLeaseCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_c7cfcbf2-e22c-42ba-aed8-6ee728b370f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_5ba22c40-94fc-42a5-a08a-f9fe3c1b1cd5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_c7cfcbf2-e22c-42ba-aed8-6ee728b370f5" xlink:to="loc_us-gaap_OperatingLeaseCost_5ba22c40-94fc-42a5-a08a-f9fe3c1b1cd5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_3650160d-81b9-4469-af44-c6526f2567b0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_c7cfcbf2-e22c-42ba-aed8-6ee728b370f5" xlink:to="loc_us-gaap_VariableLeaseCost_3650160d-81b9-4469-af44-c6526f2567b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_33077f71-c3c3-4e95-9c20-555846eab002" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_c7cfcbf2-e22c-42ba-aed8-6ee728b370f5" xlink:to="loc_us-gaap_ShortTermLeaseCost_33077f71-c3c3-4e95-9c20-555846eab002" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/LeasesMaturityofOperatingLeaseLiabilityDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#LeasesMaturityofOperatingLeaseLiabilityDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/LeasesMaturityofOperatingLeaseLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_7a90d4af-5d02-4285-9113-9ff36267bfff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_7a90d4af-5d02-4285-9113-9ff36267bfff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_d9f93b36-b41e-48de-bb63-4fdb096fac91" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_d9f93b36-b41e-48de-bb63-4fdb096fac91" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_af99c0fc-637d-4787-948f-07e52a91a39c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_af99c0fc-637d-4787-948f-07e52a91a39c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_9d8f79fe-4845-4d43-b5a5-024368e88885" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_9d8f79fe-4845-4d43-b5a5-024368e88885" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_01d6964b-ba68-4291-be7b-bb30ff64299f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_01d6964b-ba68-4291-be7b-bb30ff64299f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_ea92d392-4d3d-4ba3-971a-0bee80d82dad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_ea92d392-4d3d-4ba3-971a-0bee80d82dad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_52980f4f-4e40-4fdb-9bb5-6114103f96c4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0d0f5b88-bf18-4f2a-b82a-69d6f771fac4" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_52980f4f-4e40-4fdb-9bb5-6114103f96c4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/LeasesMaturityofOperatingLeaseLiabilityDetails_1" xlink:type="simple" xlink:href="dgii-20250630.xsd#LeasesMaturityofOperatingLeaseLiabilityDetails_1"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/LeasesMaturityofOperatingLeaseLiabilityDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_39cd2a79-a9d0-4e8d-89e6-fb00164e630b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_a651e1b1-f737-4e5d-a315-04d0f50b7dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_39cd2a79-a9d0-4e8d-89e6-fb00164e630b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_a651e1b1-f737-4e5d-a315-04d0f50b7dfa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_24259406-7a14-4476-b0e2-c50b5b3cb3ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_39cd2a79-a9d0-4e8d-89e6-fb00164e630b" xlink:to="loc_us-gaap_OperatingLeaseLiability_24259406-7a14-4476-b0e2-c50b5b3cb3ca" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.digi.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="dgii-20250630.xsd#StockBasedCompensationStockBasedCompensationExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.digi.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_a9d0e51a-76fa-49ee-820b-90f1e53cd7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_2c92f3b5-9fd3-4abc-acaa-bfd70cee813d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_a9d0e51a-76fa-49ee-820b-90f1e53cd7d8" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_2c92f3b5-9fd3-4abc-acaa-bfd70cee813d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_ce7fbdd6-9881-4bf5-b24e-21aee3c67218" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_a9d0e51a-76fa-49ee-820b-90f1e53cd7d8" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_ce7fbdd6-9881-4bf5-b24e-21aee3c67218" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
