In practice, most businesses are simply handling this on a case-by-case basis since COVID is a temporary problem. Most home networks can handle the extra load as long as the employee makes sure that other latency-sensitive traffic, like gaming or video streaming, is kept to a minimum during the hours when they need to talk. If some home routers develop problems, IT staff simply build a queue and handle those one at a time. Sometimes they'll be able to access the router remotely with the employee's permission, sometimes they'll have to walk that employee through configuration steps to fix the problem. Sometimes the employee will just have to live with it unless the company springs for a new router or a higher bandwidth tier from the employee's ISP.
Next is a detailed evaluation for each of the seven companies identified among the best providers of virtual phone numbers.

Even better, all these voicemail greetings are free and you can download the voicemail’s mp3 file! Business voicemail greeting samples. If you have a main business phone number that’s shared with the customers or publicly listed, you’ll want to make sure it has a professional voicemail message to greet callers. Here are sample greetings
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.