I have a confession to make: I haven’t recorded a new voicemail greeting since 2014. In the past four years, I (hopefully) have become more articulate, poised, and self-assured. But hear my voicemail recording, and you’d think I was still new to the work world, a little unsure of myself — and probably not an authority. Obviously I need toupdate it. And if you haven’t changed your voicemail greeting in over a year, you’re likely in the same boat. After all, a professional voicemail recording boosts your credibility, makes you seem more competent, and encourages whoever’s listening to it to continue the relationship. A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction. With that in mind, I’ve written 18 unique voicemail greetings for every situation. Pick your favorite, practice a few times, then record your new voicemail.
You can set up and manage your voicemail greetings in the Calling User Portal.

Website: https://www.openphone.co/blog/21-professional-voicemail-greeting-examples/
It’s inevitable; a caller will go to voicemail eventually. When it happens, be sure to remind the caller what extension they are leaving the message at, and any pertinent information you’d like them to provide. In some cases, such as department voicemails, you might want an option for the caller to back-out and try a different extension.