Other Security-Relevant Information 
Trace and Log Files
SAP NetWeaver Application Server (NetWeaver AS) embeds SAP NetWeaver Voice. Thus you can make use of all logging mechanisms offered by NetWeaver AS.
More information: Auditing and logging,
Print and Output Management
Access to the back-end system also uses the available SAP logging mechanisms. SAP NetWeaver Application Server ABAP also offers auditing and logging capabilities.
More information: SAP NetWeaver Application Server ABAP Security Guide
NoteWhen you use an RFC/IFC (Remote Function Call or Internet Communication Framework) communication user for access to an SAP back-end system, the user saved in the logging and tracing files is a communication user.
More information: RFC/ICF Security Guide
In addition, for access to non-SAP business systems, you must enforce suitable logging and tracing mechanisms.
End of the note.
Security for Third-Party or Additional Applications
The output of a NetWeaver Voice application is rendered on a third-party VoiceXML gateway. End users call the VoiceXML gateway, which triggers HTTP requests to your NetWeaver Voice application.
Note
You must contact the vendor of your third-party VoiceXML gateway to know their security aspects.