I have an intership at an ICT company for my thesis. My thesis is about voip security, and i have an question about bruteforce attack on a voicemailbox with a spoofed caller id.

Does anybody know how to spoof a caller-id and bruteforce attack the voicemailbox of that victim (spoofed caller id)?

I know how to spoof a caller id with metasploit and different website that can spoof the caller id, but how can i bruteforce the mailbox of that victim at the same time?

Or is the only option through asterisk?

Thank you!