<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by DFIN XBRL Schema Document - http://www.dfinsolutions.com/ - on 15-07-2026 02:29:21 AM -->
<!-- Copyright(c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<schema targetNamespace="http://www.virtus.com/20260714" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vot="http://www.virtus.com/20260714" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:srt-types="http://fasb.org/srt-types/2025" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:oef="http://xbrl.sec.gov/oef/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:oef-pre="http://xbrl.sec.gov/oef-pre/2025" xmlns:oef-lab="http://xbrl.sec.gov/oef-lab/2025" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:oef-def="http://xbrl.sec.gov/oef-def/2025" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:srt="http://fasb.org/srt/2025" xmlns:oef-sr="http://xbrl.sec.gov/oef-sr/2025" xmlns:srt-roles="http://fasb.org/srt-roles/2025" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:stpr="http://xbrl.sec.gov/stpr/2025" elementFormDefault="qualified">
	<import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
	<import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
	<import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
	<import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd"/>
	<import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>   
	<import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
	<import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
	<import namespace="http://fasb.org/srt-types/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd"/>
	<import namespace="http://xbrl.sec.gov/oef-sr/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-sr-2025.xsd"/>
	<import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
	<import namespace="http://fasb.org/us-roles/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd"/>
	<import namespace="http://fasb.org/srt-roles/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd"/>
	<annotation>
		<appinfo>
			<link:linkbase id="lnk">
				<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReport" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReport"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportHoldingsDetails"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportLineGraphDetails"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportAverageAnnualReturnDetails"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
				<link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/LargestHoldingOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#LargestHoldingOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/Other1CategoryOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other1CategoryOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#AdditionalIndexOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#BroadBasedIndexOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/Other2CategoryOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other2CategoryOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SalesLoadOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SalesLoadOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/MaturityOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#MaturityOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/IndustrySectorOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#IndustrySectorOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/CreditQualityOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#CreditQualityOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/GeographicRegionOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#GeographicRegionOnly"/>
				<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReport">              
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234172Member" xlink:label="C000234172Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234172Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234173Member" xlink:label="C000234173Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234173Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234177Member" xlink:label="C000234177Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234177Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234176Member" xlink:label="C000234176Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234176Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234180Member" xlink:label="C000234180Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234180Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234181Member" xlink:label="C000234181Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234181Member" order="7.0" />
				</link:presentationLink>
				<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234172Member" xlink:label="C000234172Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234172Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234173Member" xlink:label="C000234173Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234173Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234177Member" xlink:label="C000234177Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234177Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234176Member" xlink:label="C000234176Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234176Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234180Member" xlink:label="C000234180Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234180Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234181Member" xlink:label="C000234181Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234181Member" order="7.0" />   
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="InvestmentTypeCategorizationMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_AllOtherCorporateBondsAndNotesMember" xlink:label="AllOtherCorporateBondsAndNotesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="AllOtherCorporateBondsAndNotesMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_ChemicalsMember" xlink:label="ChemicalsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ChemicalsMember" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_RefiningMember" xlink:label="RefiningMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="RefiningMember" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_IndustrialOtherMember" xlink:label="IndustrialOtherMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="IndustrialOtherMember" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_FoodBeveragesAndTobaccoMember" xlink:label="FoodBeveragesAndTobaccoMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FoodBeveragesAndTobaccoMember" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_MetalsMiningAndSteelMember" xlink:label="MetalsMiningAndSteelMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="MetalsMiningAndSteelMember" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_GamingMember" xlink:label="GamingMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="GamingMember" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_WirelessMember" xlink:label="WirelessMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="WirelessMember" order="9.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_ExplorationAndProductionMember" xlink:label="ExplorationAndProductionMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ExplorationAndProductionMember" order="10.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_ElectricMember" xlink:label="ElectricMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ElectricMember" order="11.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_FinancialAndLeaseMember" xlink:label="FinancialAndLeaseMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FinancialAndLeaseMember" order="12.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_CorporateBondsAndNotesMember" xlink:label="CorporateBondsAndNotesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CorporateBondsAndNotesMember" order="13.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ShortTermInvestmentsMember" order="14.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_ForeignGovernmentSecuritiesMember" xlink:label="ForeignGovernmentSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ForeignGovernmentSecuritiesMember" order="15.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_AffiliatedMutualFundsMember" xlink:label="AffiliatedMutualFundsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="AffiliatedMutualFundsMember" order="16.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_CreditLinkedNotesMember" xlink:label="CreditLinkedNotesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CreditLinkedNotesMember" order="17.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CommercialPaperMember" order="18.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaturityDomain" xlink:label="MaturityDomain"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory1Domain" xlink:label="OtherCategory1Domain"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory2Domain" xlink:label="OtherCategory2Domain"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LargestHoldingsDomain" xlink:label="LargestHoldingsDomain"/>
					<!--GeographicRegionDomain Only presentation and label linkbases-->			 
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_GeographicRegionDomain" xlink:label="GeographicRegionDomain"/>
					<!--IndustrySectorDomain Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/>	
					<!--CreditQualityDomain Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CreditQualityDomain" xlink:label="CreditQualityDomain"/>	
					<!--ExternalCreditRatingFitchMember Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingFitchMember" xlink:label="ExternalCreditRatingFitchMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingFitchMember" xbrldt:usable="false" order="1.0"/>
					<!--ExternalCreditRatingMoodysMember Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingMoodysMember" xlink:label="ExternalCreditRatingMoodysMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingMoodysMember" xbrldt:usable="false" order="2.1"/>
					<!--ExternalCreditRatingStandardPoorsMember Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingStandardPoorsMember" xlink:label="ExternalCreditRatingStandardPoorsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingStandardPoorsMember" xbrldt:usable="false" order="3.1"/>
					<!--CreditRatingAMBestDomain Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CreditRatingAMBestDomain" xlink:label="CreditRatingAMBestDomain"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="CreditRatingAMBestDomain" xbrldt:usable="false" order="4.1"/>
				</link:presentationLink>
				<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails">            
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234172Member" xlink:label="C000234172Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234172Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234173Member" xlink:label="C000234173Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234173Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234177Member" xlink:label="C000234177Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234177Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234176Member" xlink:label="C000234176Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234176Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234180Member" xlink:label="C000234180Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234180Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234181Member" xlink:label="C000234181Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234181Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganCEMBIBroadDiversifiedIndexMember" xlink:label="JPMorganCEMBIBroadDiversifiedIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganCEMBIBroadDiversifiedIndexMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganEMBIGlobalDiversifiedIndexMember" xlink:label="JPMorganEMBIGlobalDiversifiedIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganEMBIGlobalDiversifiedIndexMember" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganGBIEMGlobalDiversifiedIndexMember" xlink:label="JPMorganGBIEMGlobalDiversifiedIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganGBIEMGlobalDiversifiedIndexMember" order="4.0" /> 
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_BloombergGlobalAggregateBondIndexMember" xlink:label="BloombergGlobalAggregateBondIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateBondIndexMember" order="2.0" />			  			  
				</link:presentationLink>
				<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails">            
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234172Member" xlink:label="C000234172Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234172Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234173Member" xlink:label="C000234173Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234173Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234177Member" xlink:label="C000234177Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234177Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234176Member" xlink:label="C000234176Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234176Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234180Member" xlink:label="C000234180Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234180Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_C000234181Member" xlink:label="C000234181Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000234181Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganCEMBIBroadDiversifiedIndexMember" xlink:label="JPMorganCEMBIBroadDiversifiedIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganCEMBIBroadDiversifiedIndexMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganEMBIGlobalDiversifiedIndexMember" xlink:label="JPMorganEMBIGlobalDiversifiedIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganEMBIGlobalDiversifiedIndexMember" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganGBIEMGlobalDiversifiedIndexMember" xlink:label="JPMorganGBIEMGlobalDiversifiedIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganGBIEMGlobalDiversifiedIndexMember" order="4.0" /> 
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_BloombergGlobalAggregateBondIndexMember" xlink:label="BloombergGlobalAggregateBondIndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateBondIndexMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_WithSalesLoadMember" xlink:label="WithSalesLoadMember"/>
				</link:presentationLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234172Member" xlink:label="C000234172Member"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234172Member" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234173Member" xlink:label="C000234173Member"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234173Member" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234177Member" xlink:label="C000234177Member"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234177Member" order="3.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234176Member" xlink:label="C000234176Member"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234176Member" order="4.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234180Member" xlink:label="C000234180Member"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234180Member" order="5.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234181Member" xlink:label="C000234181Member"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234181Member" order="6.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/Other1CategoryOnly">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory1Domain" xlink:label="OtherCategory1Domain"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/Other2CategoryOnly">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory2Domain" xlink:label="OtherCategory2Domain"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/LargestHoldingOnly">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LargestHoldingsDomain" xlink:label="LargestHoldingsDomain"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SalesLoadOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_WithSalesLoadMember" xlink:label="WithSalesLoadMember"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="InvestmentTypeCategorizationMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_AllOtherCorporateBondsAndNotesMember" xlink:label="AllOtherCorporateBondsAndNotesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="AllOtherCorporateBondsAndNotesMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ChemicalsMember" xlink:label="ChemicalsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ChemicalsMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_RefiningMember" xlink:label="RefiningMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="RefiningMember" order="3.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_IndustrialOtherMember" xlink:label="IndustrialOtherMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="IndustrialOtherMember" order="4.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_FoodBeveragesAndTobaccoMember" xlink:label="FoodBeveragesAndTobaccoMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FoodBeveragesAndTobaccoMember" order="5.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_MetalsMiningAndSteelMember" xlink:label="MetalsMiningAndSteelMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="MetalsMiningAndSteelMember" order="6.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_GamingMember" xlink:label="GamingMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="GamingMember" order="7.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_WirelessMember" xlink:label="WirelessMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="WirelessMember" order="8.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ExplorationAndProductionMember" xlink:label="ExplorationAndProductionMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ExplorationAndProductionMember" order="9.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ElectricMember" xlink:label="ElectricMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ElectricMember" order="10.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_FinancialAndLeaseMember" xlink:label="FinancialAndLeaseMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FinancialAndLeaseMember" order="11.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_CorporateBondsAndNotesMember" xlink:label="CorporateBondsAndNotesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CorporateBondsAndNotesMember" order="12.0"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ShortTermInvestmentsMember" order="13.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ForeignGovernmentSecuritiesMember" xlink:label="ForeignGovernmentSecuritiesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ForeignGovernmentSecuritiesMember" order="14.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_AffiliatedMutualFundsMember" xlink:label="AffiliatedMutualFundsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="AffiliatedMutualFundsMember" order="15.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_CreditLinkedNotesMember" xlink:label="CreditLinkedNotesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CreditLinkedNotesMember" order="16.0"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CommercialPaperMember" order="17.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_BloombergGlobalAggregateBondIndexMember" xlink:label="BloombergGlobalAggregateBondIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateBondIndexMember" order="1.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly">              
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganCEMBIBroadDiversifiedIndexMember" xlink:label="JPMorganCEMBIBroadDiversifiedIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganCEMBIBroadDiversifiedIndexMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganEMBIGlobalDiversifiedIndexMember" xlink:label="JPMorganEMBIGlobalDiversifiedIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganEMBIGlobalDiversifiedIndexMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganGBIEMGlobalDiversifiedIndexMember" xlink:label="JPMorganGBIEMGlobalDiversifiedIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="JPMorganGBIEMGlobalDiversifiedIndexMember" order="3.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/MaturityOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaturityDomain" xlink:label="MaturityDomain"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/IndustrySectorOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CreditQualityOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CreditQualityDomain" xlink:label="CreditQualityDomain"/>
				</link:definitionLink>
				<!--GeographicRegionOnly use only for STPR-->
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/GeographicRegionOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_GeographicRegionDomain" xlink:label="GeographicRegionDomain"/>
				</link:definitionLink>
				<link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">               
					<link:loc xlink:type="locator" xlink:href="#vot_AllOtherCorporateBondsAndNotesMember" xlink:label="AllOtherCorporateBondsAndNotesMember"/>
					<link:label xlink:type="resource" xlink:label="label_AllOtherCorporateBondsAndNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">All other Corporate Bonds and Notes [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AllOtherCorporateBondsAndNotesMember" xlink:to="label_AllOtherCorporateBondsAndNotesMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ChemicalsMember" xlink:label="ChemicalsMember"/>
					<link:label xlink:type="resource" xlink:label="label_ChemicalsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Chemicals [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ChemicalsMember" xlink:to="label_ChemicalsMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_RefiningMember" xlink:label="RefiningMember"/>
					<link:label xlink:type="resource" xlink:label="label_RefiningMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Refining [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RefiningMember" xlink:to="label_RefiningMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_IndustrialOtherMember" xlink:label="IndustrialOtherMember"/>
					<link:label xlink:type="resource" xlink:label="label_IndustrialOtherMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Industrial Other [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IndustrialOtherMember" xlink:to="label_IndustrialOtherMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_FoodBeveragesAndTobaccoMember" xlink:label="FoodBeveragesAndTobaccoMember"/>
					<link:label xlink:type="resource" xlink:label="label_FoodBeveragesAndTobaccoMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Food Beverages And Tobacco [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FoodBeveragesAndTobaccoMember" xlink:to="label_FoodBeveragesAndTobaccoMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_MetalsMiningAndSteelMember" xlink:label="MetalsMiningAndSteelMember"/>
					<link:label xlink:type="resource" xlink:label="label_MetalsMiningAndSteelMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Metals Mining And Steel [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MetalsMiningAndSteelMember" xlink:to="label_MetalsMiningAndSteelMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_GamingMember" xlink:label="GamingMember"/>
					<link:label xlink:type="resource" xlink:label="label_GamingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Gaming [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GamingMember" xlink:to="label_GamingMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_WirelessMember" xlink:label="WirelessMember"/>
					<link:label xlink:type="resource" xlink:label="label_WirelessMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Wireless [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WirelessMember" xlink:to="label_WirelessMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ExplorationAndProductionMember" xlink:label="ExplorationAndProductionMember"/>
					<link:label xlink:type="resource" xlink:label="label_ExplorationAndProductionMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Exploration And Production [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ExplorationAndProductionMember" xlink:to="label_ExplorationAndProductionMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ElectricMember" xlink:label="ElectricMember"/>
					<link:label xlink:type="resource" xlink:label="label_ElectricMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Electric [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ElectricMember" xlink:to="label_ElectricMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_FinancialAndLeaseMember" xlink:label="FinancialAndLeaseMember"/>
					<link:label xlink:type="resource" xlink:label="label_FinancialAndLeaseMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Financial And Lease [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FinancialAndLeaseMember" xlink:to="label_FinancialAndLeaseMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_CorporateBondsAndNotesMember" xlink:label="CorporateBondsAndNotesMember"/>
					<link:label xlink:type="resource" xlink:label="label_CorporateBondsAndNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Corporate Bonds and Notes [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CorporateBondsAndNotesMember" xlink:to="label_CorporateBondsAndNotesMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganCEMBIBroadDiversifiedIndexMember" xlink:label="JPMorganCEMBIBroadDiversifiedIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_JPMorganCEMBIBroadDiversifiedIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">J P Morgan CEMBI Broad Diversified Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="JPMorganCEMBIBroadDiversifiedIndexMember" xlink:to="label_JPMorganCEMBIBroadDiversifiedIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_BloombergGlobalAggregateBondIndexMember" xlink:label="BloombergGlobalAggregateBondIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateBondIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Global Aggregate Bond Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateBondIndexMember" xlink:to="label_BloombergGlobalAggregateBondIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234172Member" xlink:label="C000234172Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000234172Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234172 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234172Member" xlink:to="label_C000234172Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000234172Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Class I</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234172Member" xlink:to="label_C000234172Member_2"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234173Member" xlink:label="C000234173Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000234173Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234173 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234173Member" xlink:to="label_C000234173Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000234173Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Class A</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234173Member" xlink:to="label_C000234173Member_2"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:label xlink:type="resource" xlink:label="label_ShortTermInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Short-Term Investments [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermInvestmentsMember" xlink:to="label_ShortTermInvestmentsMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234177Member" xlink:label="C000234177Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000234177Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234177 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234177Member" xlink:to="label_C000234177Member"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234176Member" xlink:label="C000234176Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000234176Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234176 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234176Member" xlink:to="label_C000234176Member"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganEMBIGlobalDiversifiedIndexMember" xlink:label="JPMorganEMBIGlobalDiversifiedIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_JPMorganEMBIGlobalDiversifiedIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">J P Morgan EMBI Global Diversified Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="JPMorganEMBIGlobalDiversifiedIndexMember" xlink:to="label_JPMorganEMBIGlobalDiversifiedIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_ForeignGovernmentSecuritiesMember" xlink:label="ForeignGovernmentSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_ForeignGovernmentSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Foreign Government Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignGovernmentSecuritiesMember" xlink:to="label_ForeignGovernmentSecuritiesMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_AffiliatedMutualFundsMember" xlink:label="AffiliatedMutualFundsMember"/>
					<link:label xlink:type="resource" xlink:label="label_AffiliatedMutualFundsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Affiliated Mutual Funds [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AffiliatedMutualFundsMember" xlink:to="label_AffiliatedMutualFundsMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_CreditLinkedNotesMember" xlink:label="CreditLinkedNotesMember"/>
					<link:label xlink:type="resource" xlink:label="label_CreditLinkedNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Credit Linked Notes [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CreditLinkedNotesMember" xlink:to="label_CreditLinkedNotesMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_JPMorganGBIEMGlobalDiversifiedIndexMember" xlink:label="JPMorganGBIEMGlobalDiversifiedIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_JPMorganGBIEMGlobalDiversifiedIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">J P Morgan GBI EM Global Diversified Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="JPMorganGBIEMGlobalDiversifiedIndexMember" xlink:to="label_JPMorganGBIEMGlobalDiversifiedIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234180Member" xlink:label="C000234180Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000234180Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234180 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234180Member" xlink:to="label_C000234180Member"/>
					<link:loc xlink:type="locator" xlink:href="#vot_C000234181Member" xlink:label="C000234181Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000234181Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234181 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234181Member" xlink:to="label_C000234181Member"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember"/>
					<link:label xlink:type="resource" xlink:label="label_CommercialPaperMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Commercial Paper [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommercialPaperMember" xlink:to="label_CommercialPaperMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="InvestmentTypeAxis"/>
					<link:label xlink:type="resource" xlink:label="label_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investment Type [Axis]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentTypeAxis" xlink:to="label_InvestmentTypeAxis" priority="1"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="AssetsNet"/>
					<link:label xlink:type="resource" xlink:label="label_AssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Net Assets</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetsNet" xlink:to="label_AssetsNet" priority="1"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="InvestmentCompanyPortfolioTurnover"/>
					<link:label xlink:type="resource" xlink:label="label_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investment Company Portfolio Turnover</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentCompanyPortfolioTurnover" xlink:to="label_InvestmentCompanyPortfolioTurnover" priority="1"/>                
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag" xlink:label="dei_NoTradingSymbolFlag"/>
					<link:label xlink:type="resource" xlink:label="label_NoTradingSymbolFlag" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">No Trading Symbol Flag</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_NoTradingSymbolFlag" xlink:to="label_NoTradingSymbolFlag" priority="1"/>		
				</link:labelLink>
			</link:linkbase>
		</appinfo>
	</annotation>   
	<element name="AllOtherCorporateBondsAndNotesMember" id="vot_AllOtherCorporateBondsAndNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ChemicalsMember" id="vot_ChemicalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="RefiningMember" id="vot_RefiningMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="IndustrialOtherMember" id="vot_IndustrialOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="FoodBeveragesAndTobaccoMember" id="vot_FoodBeveragesAndTobaccoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="MetalsMiningAndSteelMember" id="vot_MetalsMiningAndSteelMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="GamingMember" id="vot_GamingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="WirelessMember" id="vot_WirelessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ExplorationAndProductionMember" id="vot_ExplorationAndProductionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ElectricMember" id="vot_ElectricMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="FinancialAndLeaseMember" id="vot_FinancialAndLeaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CorporateBondsAndNotesMember" id="vot_CorporateBondsAndNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="JPMorganCEMBIBroadDiversifiedIndexMember" id="vot_JPMorganCEMBIBroadDiversifiedIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergGlobalAggregateBondIndexMember" id="vot_BloombergGlobalAggregateBondIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000234172Member" id="vot_C000234172Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000234173Member" id="vot_C000234173Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000234177Member" id="vot_C000234177Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000234176Member" id="vot_C000234176Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="JPMorganEMBIGlobalDiversifiedIndexMember" id="vot_JPMorganEMBIGlobalDiversifiedIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ForeignGovernmentSecuritiesMember" id="vot_ForeignGovernmentSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="AffiliatedMutualFundsMember" id="vot_AffiliatedMutualFundsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CreditLinkedNotesMember" id="vot_CreditLinkedNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="JPMorganGBIEMGlobalDiversifiedIndexMember" id="vot_JPMorganGBIEMGlobalDiversifiedIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000234180Member" id="vot_C000234180Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000234181Member" id="vot_C000234181Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
</schema>
