“Congratulations! You’ve reached the right person! It’s [your name]. Unfortunately, you’ve called at the wrong time. Please leave a message with all your contact information, and I’ll call you back within 24 hours.”
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.

The Business plan also comes with free minutes and discounts, simultaneous calls, access to call recording and call queues, priority support, and voice responses.
When planning, it's important to include stakeholders from all the key parts of your business. Yes, this especially includes the IT staff and the data security folks since your voice calls will now be data communications. But it also needs to include the workers who'll actually be using the system to get work done, especially the work that drives revenue and engages customers.