A regular cordless landline phone setup should work.
I have magicjack. only 1 ethernet connection.
plug magic jack dongle into your power source. 1 ethernet from magic jack dongle to the router and one phone line from magic jack to the base phone connection. No PC connection needed. No other wiring needed. 43 bucks a year after initial costs(49.99 plus taxes etc which includes 1st year of service)
Magic Jack I have a landline Panasonic Cordless phone system...1 base connection and 3 more airphones in the house. Bluetooth and they have headset jacks on the phones.
Panasonic KX-TG994SK DECT 6.0 Cordless Phone Magic jack cost is so cheap, I'm paid until sept. 2031.
I'm guessing you could do that with most VOIP services.
Happy hunting
