If a phone rings once and then goes to voicemail or rings only briefly, it You can't definitively know the cause of a phone barely ringing and going to voicemail because neither a phone company nor the phone's operating system provider will tell you if your phone number is blocked.
Your personal voicemail greeting should be brief and to the point. State your name and your availability, project a welcoming aura, and ask the caller for whatever information you need from them. Hi, you've reached the voicemail of Mike Downing. I'm not available to answer the phone right now. My office hours are Monday through Thursday, 10 am to 4 pm. Please leave your name and phone number and I'll get back to you as soon as possible. Thanks. 2. Company Wide Voicemail Greeting

A phone call to your business is often the first encounter your customers and prospects have with your company. If no one is available to take the call, having the best professional voicemail greetings possible is important to leave a great first impression and to ensure that business opportunities don’t slip by.
A voicemail greeting can be pivotal in attracting a potential customer to your company or repelling him! So, it may be worthwhile to utilize some tried and tested tips to frame voicemail greetings for your company. The first line must include a brief description of your company and the services it offers clearly. Tell the callers the time frame within which they will get a call from your end. Ensure the voice used in recording the greeting is cheerful and not drab one. Ensure the greeting is recorded not in a hurried manner so that the callers can understand each word without issues. Try keeping the voicemail message length to 20 seconds or so.