Typically, most of these services are uniform—i.e. include the same tools and features (send a script, they record it in a tone you approve, they send it as a file, you supply any feedback, etc.); however, there are some services that go above and beyond. For example, VoiceOverPro, is a single voice professional who records 30 second voicemail messages based on users’ scripts. This is standard; however, users also have options like adding music, recording up to 60 seconds (or 150 words), rush, 2-day turnaround, and even same day delivery.
Enhanced Voicemail lets you listen to messages, create personal or corporate greetings and access your voicemail box from anywhere there's phone or internet access. In the Optimum Business Account Center, you can manage many advanced voicemail features, including listening to messages online, setting voicemail alerts and sending your messages to your email account. To activate your voicemail box you can simply dial *86 from your Optimum Voice line and follow the voice prompts or log in to the Optimum Business Account Center, click the "Phone" tab and select "Voicemail" from the drop-down menu. Here you will find the complete instruction guide to activate and manage your voicemail online or via telephone.

But in the past few years, its use has been in decline. And some offices have opted to get rid of it altogether.
3.) Bienvenido/a a John Doe. En estos momentos no podemos atender su llamada o nos está llamando fuera de nuestro horario de oficina. Por favor, déjenos un mensaje con su nombre y número de teléfono, le devolveremos la llamada lo antes posible. Gracias y hasta pronto.