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.
With the ability to grow without the need for replacement hardware, Panasonic is an ideal solution for small businesses that desire an easily expandable solution. Easily connect multiple locations together for calling from store-to-store, corporate-to-retail, or country-to-country for example. Panasonic’s cordless telephone capabilities include your choice from a standard cordless model, a compact model with Bluetooth headset support, or a ruggedized dust, shock, and splash resistant IP54-complaint cordless model, And Panasonic includes a standard 2-year warranty with an option for up to 7 years of optional extended warranty coverage.

Instead of leading with tired old lines like 'Your call is important to us', brush up on your telephone etiquette and start your voicemail with a thank you.
A professional voicemail greeting is a recorded message that welcomes callers to your business when no one is available to pick up the call. For a polished call experience, the greeting should reflect who the client is calling – whether a general business number, department, team, or individual – and when the customer can expect the call to be returned.