Thanks for your replies. I have tried the volume adjustment with no change. The 7314 works on the same jack. Why would a working 7312 from another store result in all the lights blinking when installed in my store? It is plugged into the KSU jack. Also, we get our shells delivered daily, so we don't have any flour or the such on our hands. Besides, the 7314 is the first phone of choice so it gets used the most and the others are used not as much and are off to the sides. It just seems like I need to punch in a code for the phones from the other store. But, what the h**l do I know? I do have the little manuals they gave us but there is no trouble shooting guide in them. Thanks again for all the help!

Mike