However, Hinze says that the way businesses use voicemail has changed radically. What once meant a constantly clogged answering machine is now a service that almost always involves the incorporation of more modern functions like automated message transcription. For customers picking up a phone after your normal hours of operation, rather than going to your website, voicemail greetings can keep them apprised of business hours, brief company news items and other critical information.
You can also upload an unavailable greeting using the OnSIP app. After logging in, click on the Voicemail Settings gear icon at the far right. Make sure that the Custom Greeting is toggled to "on." You will then see an option to upload a .wav file of your choice. This recording will serve as your unavailable message.

Length – if your callers typically wait 2 minutes at a time, then at least 2 minutes of programming should be the goal. The idea is to ensure the callers don’t hear repeated messages every time they call. A typical on-hold message is 4-8 minutes in length.
Many of our users don’t need calls routed to their phone, they just want a good virtual voicemail system. We can do that, too. Just set up your VirtualPBX account with multiple voicemail boxes for each user or purpose you need. Furthermore, we can route calls directly to voicemail, without ringing a phone first.