[retiredguy123]

Originally Posted by BrianL99

The OP is not asking if the phone will work on a VOIP system. Yes, most any phone can work on a VOIP system, with the proper "adaptor".

The OP is asking if the phone will work, with a proprietary, business phone system (that just happens to use VOIP). It's not the same thing as plugging a phone into a telephone jack or ethernet jack, to access VOIP lines that someone like Xfinity has provided to your home.

The answer to the question, is "yes" with some reservations. All functions of the system may not be available. Some modicum of "programming" may be necessary, depending on the functions the Assisted Living Facility has programmed into their system.

Yealink is one of the premier providers of commercial phone systems. When you plug the phone into the system, the phone should update automatically, with the compatible software. Some functions may not be available, without some modicum of simple "programming". [This from the Yealink website]

I interpreted the OP's post as just wanting to replace a corded phone with a cordless phone.