In the 90s, someone gave me a prototype mobile carphone system that you would set up outside your home, and hooked up to your landline. The car would then radi

In the 90s, someone gave me a prototype mobile carphone system that you would set up outside your home, and hooked up to your landline. The car would then radio back to your home. It was quite polished and looked like a production unit, but sadly I didn't keep anything. This familiar to anyone?