POST api/admin/UpdateEnterpriseTrunkGroupInstance

{
  "GroupId": "sample string 1",
  "TrunkGroupName": "sample string 2",
  "NewTrunkGroupName": "sample string 3",
  "NewSipAuthenticationPassword": "sample string 4",
  "Department": {
    "ServiceProviderId": "sample string 1",
    "GroupId": "sample string 2",
    "Name": "sample string 3"
  },
  "MaximumActiveCallsAllowed": 5,
  "MaximumActiveIncomingCallsAllowed": 6,
  "MaximumActiveOutgoingCallsAllowed": 7,
  "EnableAuthentication": true,
  "AuthenticationUserName": "sample string 9",
  "NewAuthenticationPassword": "sample string 10",
  "TrunkGroupIdentity": "sample string 11",
  "OTGDTGIdentity": "sample string 12",
  "EnableTrunkGroupPrefix": true,
  "TrunkGroupPrefix": "sample string 14",
  "AllowCallsDirectlyToTrunkGroupWithTrunkIdentity": true,
  "AllowCallsDirectlyToTrunkGroupWithDTGIdentity": true,
  "IncludeTrunkIdentityForCallsToTrunkGroup": true,
  "IncludeDTGIdentityForCallsToTrunkGroup": true,
  "IncludeTrunkIdentityForCallsFromTrunkGroup": true,
  "IncludeOTGIdentityForCallsFromTrunkGroup": true,
  "EnableNetworkAddressIdentity": true,
  "AllowUnscreenedCalls": true,
  "AllowUnscreenedEmergencyCalls": true,
  "RouteToPeeringDomain": true,
  "PeeringDomain": "sample string 25",
  "PilotUserCallOptimizationPolicy": 26,
  "UseSystemUserLookupPolicy": true,
  "TrunkGroupUserLookupPolicy": 28,
  "UseSystemCLIDSourceForScreenedCallsPolicy": true,
  "CallingLineIdentitySourceForScreenedTrunkGroupCallsPolicy": 30,
  "UseSystemSupportConnectedIdentityPolicy": true,
  "SupportConnectedIdentityPolicy": 32,
  "PilotUserCallingLineIdentityForExternalCallsUsagePolicy": 33,
  "PilotUserCallingLineIdentityUsageForEmergencyCallsPolicy": 34,
  "PilotUserChargeNumberUsagePolicy": 35,
  "AccessDevice": {
    "DeviceName": "sample string 1",
    "DeviceLevel": 2
  },
  "PilotUserId": "sample string 36"
}

<TrunkGroupModifyDTO xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/MSPApi.DTO.EnterpriseTrunk">
  <AccessDevice>
    <DeviceLevel>2</DeviceLevel>
    <DeviceName>sample string 1</DeviceName>
  </AccessDevice>
  <AllowCallsDirectlyToTrunkGroupWithDTGIdentity>true</AllowCallsDirectlyToTrunkGroupWithDTGIdentity>
  <AllowCallsDirectlyToTrunkGroupWithTrunkIdentity>true</AllowCallsDirectlyToTrunkGroupWithTrunkIdentity>
  <AllowUnscreenedCalls>true</AllowUnscreenedCalls>
  <AllowUnscreenedEmergencyCalls>true</AllowUnscreenedEmergencyCalls>
  <AuthenticationUserName>sample string 9</AuthenticationUserName>
  <CallingLineIdentitySourceForScreenedTrunkGroupCallsPolicy>30</CallingLineIdentitySourceForScreenedTrunkGroupCallsPolicy>
  <Department xmlns:d2p1="http://schemas.datacontract.org/2004/07/MSPApi.DTO">
    <d2p1:GroupId>sample string 2</d2p1:GroupId>
    <d2p1:Name>sample string 3</d2p1:Name>
    <d2p1:ServiceProviderId>sample string 1</d2p1:ServiceProviderId>
  </Department>
  <EnableAuthentication>true</EnableAuthentication>
  <EnableNetworkAddressIdentity>true</EnableNetworkAddressIdentity>
  <EnableTrunkGroupPrefix>true</EnableTrunkGroupPrefix>
  <GroupId>sample string 1</GroupId>
  <IncludeDTGIdentityForCallsToTrunkGroup>true</IncludeDTGIdentityForCallsToTrunkGroup>
  <IncludeOTGIdentityForCallsFromTrunkGroup>true</IncludeOTGIdentityForCallsFromTrunkGroup>
  <IncludeTrunkIdentityForCallsFromTrunkGroup>true</IncludeTrunkIdentityForCallsFromTrunkGroup>
  <IncludeTrunkIdentityForCallsToTrunkGroup>true</IncludeTrunkIdentityForCallsToTrunkGroup>
  <MaximumActiveCallsAllowed>5</MaximumActiveCallsAllowed>
  <MaximumActiveIncomingCallsAllowed>6</MaximumActiveIncomingCallsAllowed>
  <MaximumActiveOutgoingCallsAllowed>7</MaximumActiveOutgoingCallsAllowed>
  <NewAuthenticationPassword>sample string 10</NewAuthenticationPassword>
  <NewSipAuthenticationPassword>sample string 4</NewSipAuthenticationPassword>
  <NewTrunkGroupName>sample string 3</NewTrunkGroupName>
  <OTGDTGIdentity>sample string 12</OTGDTGIdentity>
  <PeeringDomain>sample string 25</PeeringDomain>
  <PilotUserCallOptimizationPolicy>26</PilotUserCallOptimizationPolicy>
  <PilotUserCallingLineIdentityForExternalCallsUsagePolicy>33</PilotUserCallingLineIdentityForExternalCallsUsagePolicy>
  <PilotUserCallingLineIdentityUsageForEmergencyCallsPolicy>34</PilotUserCallingLineIdentityUsageForEmergencyCallsPolicy>
  <PilotUserChargeNumberUsagePolicy>35</PilotUserChargeNumberUsagePolicy>
  <PilotUserId>sample string 36</PilotUserId>
  <RouteToPeeringDomain>true</RouteToPeeringDomain>
  <SupportConnectedIdentityPolicy>32</SupportConnectedIdentityPolicy>
  <TrunkGroupIdentity>sample string 11</TrunkGroupIdentity>
  <TrunkGroupName>sample string 2</TrunkGroupName>
  <TrunkGroupPrefix>sample string 14</TrunkGroupPrefix>
  <TrunkGroupUserLookupPolicy>28</TrunkGroupUserLookupPolicy>
  <UseSystemCLIDSourceForScreenedCallsPolicy>true</UseSystemCLIDSourceForScreenedCallsPolicy>
  <UseSystemSupportConnectedIdentityPolicy>true</UseSystemSupportConnectedIdentityPolicy>
  <UseSystemUserLookupPolicy>true</UseSystemUserLookupPolicy>
</TrunkGroupModifyDTO>

Sample not available.