Therefore, as a rule of thumb, it has been advised that business professionals should return calls within 24 hours. If for any reason a prompt callback is not possible, for instance, if it is known that the call may be lengthy and the individual does not have time to talk until another day or so, they should still leave a brief voicemail message to acknowledge receipt of the call and advise when they anticipate being able to have the discussion. Additionally, voicemail messages should be checked at least once a day, if not more.
In 2019, Vonage collected 2,010 survey responses asking consumers about their experiences with IVR. 85 percent of the respondents said they had abandoned a call after reaching an auto attendant. They also found that on average, consumers abandoned 27 percent of calls to businesses because they reached an auto attendant. Additionally, 51 percent of consumers abandoned a business altogether after one of these experiences.

11. "Hi, you've reached [company]. Unfortunately, we're currently unavailable. But we want to talk to you — so please leave your name and number, as well as your reason for calling, and someone will call back ASAP."
Extension mailboxes enable businesses to share a group of mailboxes, but route incoming calls to one main voicemail number. They include a primary mailbox and up to nine (9) additional boxes. Each has characteristics of standard voice mailboxes and must be activated by an authorized user before they can be used. Once activated, log in to the mailbox, change the PIN, record your greeting and your name.