Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Overall, a Functional Product

The AT&T 974 is a good small business phone. There are only two problems with it, and these appear to be common with all of the AT&T small business multi-line phones. (1) AT&T frequently introduces new models and discontinues the previous ones. Unfortunately, they do not make the intercom, and some other features, backwards-compatible. So, if you want to get the most from your system, you have to upgrade all the phones in the office. This model is discontinued, and it's replacement--I think it's the 1074--causes all sorts of problems with the 974s in the office (intercom, transfer, hold, for example). (2) When you're on a call, there should be an option to mute, or partially mute, the ringer on the other lines. It's distracting to have the phone ring at full volume when you're trying to talk to somebody else. You can press the "do not disturb" button, but if you forget to turn off "do not disturb" when you hang up, you'll miss subsequent calls.