Answering to your questions:
For removing any announcement on Voicemail you need to do the following:
- Edit the extension 1001, and, on the Voicemail tab, enable the option “Skip Instructions“
- Now, on the Ring Group, in the dropdown “Last Destination“, select the option “Voicemail Direct“, and then, select the desired extension, in this case, the extension 1001.
Off-topic, sorry for answering in English, but in this way, my answer may help others.
