Also known as analog lines, POTS is the traditional method to support making and receiving phone calls over the Public Switched Telephone network. With the many benefits of data network services, there aren't many cases where POTS lines are the best way to go. Usually they are only need when a device needs a loop start. Gradually, the ILECs are phasing out POTS service and in many areas of the country, you can't even order it, anymore. For instance, Hurricane Sandy wiped out most of the copper infrastructure in New York/New Jersey and Verizon did not repair. They replaced it with fiber and wireless infrastructure.
For a monthly price of $49.99, you can get MightyCall’s Standard virtual mobile number pack. This plan includes five toll-free or local numbers, unlimited users, unlimited clients in the contact book, voice to text, call recording, presence indicators, as well as desk phones and softphones.

That does not necessarily mean all of them are phone calls, which is why you need a VoIP system that can support your business.
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.