Hi Reto,
That is true. The Network Locale File provides country specific Tones etc. that you or may not want or need. You do not have to install one with the other.
Defining User Locales
User locale files provide translated text and voice prompts, if available, for phone displays, user applications, and user web pages in the locale that the user chooses. User-only locale installers exist on cisco.com.
Defining Network Locales
Network locale files provide country-specific phone tones and gateway tones, if available.
Hope this helps!
Rob
