Yes, this is a "Telstar" Call Control system. It came out around 1985 (if I remember correctly.) It was essentially an answering machine that allowed incoming callers to leave a "message" (their number) by using the touch tones on their phone. It had some other features like last number dial, speed dial, and incoming hold that were all activated using touch tones on your phone. It was designed to be wired to an RJ-31X jack so that it could be the first device on the line.

I still have one of these and a manual. If you need the manual I can scan it when I get a change.