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.
Don’t Use The Computer Generated Greeting—I get aggravated when I hear a computer generated message like, “The person you are calling at 9-4-1-5-5-5-1-2-3-4 is not available to take your call, please leave a message at the tone.” Even if the number repeated by the system is the same one I have for the person, it requires extra work on my part to confirm I’ve dialed the right number and even then I am still left wondering if this is the right number for the person I am calling.

Businesses should have two main types of greetings to create an excellent call experience. The first one is what we call a “welcome greeting” – this greeting welcomes callers to your business. Typically, a welcome greeting will present a menu of call options like hours, location, or customer service. For more details on how to create a welcome greeting for your general business number, read this article.
“Thanks for calling the desk of (insert your name) at (insert your company name). I’m either on a call or away from my desk but if you leave your name, phone number, and the reason for calling, I’ll return your call as soon as possible. Thank You.”