Context does matter here. If the caller would reasonably expect you to answer the phone (such as if they were calling a store or other place of business), an apology for not being able to get to the phone makes the most sense.
Have Energy in Your Voice—When you record your voicemail greeting, make a positive impression. Speak as though you are enjoying a successful life. People are instinctively drawn to people with positive attitudes. If you sound like you just woke up, you will likely make a negative impression.

7.) Welcome to the law office John Doe. Sorry, we're currently unable to answer your call personally, as you call during our annual holidays. Feel free to send us an email to [email protected] - We will contact as soon as possible at our return. In urgent cases, please contact our office representative. These can be found on our website www.lawoffice-johndoe.de. Many thanks for your call - Good bye.
One system and one monthly bill across all your office locations and even your mobile workforce. Admins and users can change their own settings easily, on the fly, from the Web or even from their mobile devices.