This topic describes how you can manage group voicemail greetings, including playing, downloading, and deleting greetings.
That doesn't necessarily mean the telecom giant makes less money. Hakl says businesses are substituting other, newer services that they're using instead.

A good voicemail greeting is short and professional, lets people know that you’ll get back to them, and invites callers to continue engaging with a call-to-action. You should also show your personality if you’re in an industry or role that allows that. If your industry is more conservative, however, you’ll want to keep humor and personal touches to a minimum. A greeting Your name Your company A simple explanation for missing the call (e.g. you’re away from the phone or are on holiday) A rough estimate of when you’ll get back to the person An alternative person to reach out to (if you’re out of office) An alternative mode of communication (if you prefer email or text) A call-to-action such as “Leave a message” or “Send me an email at me@example.com”
5. You have reached [your business]. We are currently closed. Our normal hours of operations are from [hours] [days]. We are closed on [days]. Please leave us a message with your name and number and we will return your call when the office reopens. You may hang up after leaving your message or press the [key] for additional options. Thank you for calling.