A secretary in a doctor’s office creates a voicemail greeting that says, “If you have a scheduled meeting with us, we could use copies of all your medical documents from last year, so come prepared.” Using the word “could” gives patients the impression that they don’t necessarily “need” last year’s documents. See the difference between “could” and “need”? Your word choice can impact a future meeting significantly. If you want a customer to perform a specific action, you need to pay close attention to how you express your calls-to-action.
In reality, that's when you can bump into voice quality problems. Your IT staff not only can't control those home routers remotely, they often won't even know their capabilities. These routers were either chosen by the employee or by the employee's ISP, so even in a midsized company, you're looking at hundreds of different makes and models. Some will have more advanced features, like QoS, some won't. Those that do may also implement QoS and similar features in different ways.

Ooma is a “smart communications platform” for businesses and consumers. A publicly traded company (NYSE:OOMA), it offers small business phone services for $19.95 per user per month currently. The plan comes with unlimited calling in North America and Puerto Rico. No contracts are required. Oooma offers VOIP phone and conference hardware which are an additional one-time cost. Feature We Like: HD voice quality.
However, like all technologies voicemail's utility has diminished over the years. Now there are far more efficient messaging services available. Text messages, instant messages via social media, and emails are all a more robust and effective way to deliver a message.