Hello, I’m Nathan, and I’ll be assisting you today.
Sorry to hear that you’re having trouble with this but I’ll do my best to help you out, John.
No, you cannot, these are 2 very different systems. The only handsets compatible with your existing base station (which can accommodate up to 5 total) is the kx-tga950 model, which you may purchase online here: http://amzn.to/2aAEDix
Once you have the new handset, it will have to be registered:
On the new one, key in Menu #130
then press and hold the locator (find hs) button on the main base for about 5 seconds,
then OK on the new handset, which will give a long beep to confirm success.
Repeat as needed for other handsets.
If you have any other questions, just let me know. Otherwise, please take a moment to rate my service using the stars at the top of the page; hopefully I have earned 5 Stars. I also invite you to contact me directly with any future support needs at http://bit.ly/1QwLxGh and ask for Nathan.
Thank you, ***** ***** a nice day,