Here's a blast from the past. Hayes Smartmodem with power supply. The original Boot Factory BBS ran on this one back in the 80's. The lights come on. I sent commands to it from an Atari thru an 850 interface and it appeared to work. I can also sell you an 850 interface to hook it up to your Atari. Sold AS-IS.
Someone asked what the baud rate was.... 2400.