In a DD VS, all request arguments need to be mapped in the Excel/CSV file. If all the request data arguments with values are not matched then, you will get a 404 not found.
The Excel file you shared has the below columns:
activityName,senderURI, userid, security, conversationID, requestID, cableModemMACAddress and embeddedDigitalVoiceAdapterMACAddress.
The VSI file has the below Request Data Arguments:
GetEmbeddedDigitalVoiceAdapterParametersRequest_cableModemMACAddress
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_activityName
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_conversationID
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_requestID
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_security
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_senderURI
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_userid
GetEmbeddedDigitalVoiceAdapterParametersRequest_requestHeader_requestTimestamp
If any of the above request data arguments are not mapped to Excel columns and values are not matched then you get a "404 not found".