A:AnswerHello Rinch. At this present time we have had no problem with the AT&T Model DL72310 phones. They are working fine. If I may suggest that you download the manual for your phone. That hopefully that it will guide you in right direction. My second option would be contact AT&T Tech support to assist you in correcting the problem.
Hope this may be helpful to you.
A:AnswerYes, you can change the amount of rings. The instructions are on page 75 of the quick start guide.
Press menu/select in idle mode.
Press cid or dir to highlight answering sys, then press menu/select.
Press cid or dir to highlight ans sys setup, then press menu/select.
Press cid or dir to highlight # of rings, then press menu/select.
Press cid or dir to choose from 6, 5, 4, 3, 2 or toll saver.
Press menu/select to save.
A:AnswerOnly the base unit with the answering machine needs a phone wall jack in addition to an electrical outlet. The other 2 handsets only require an electrical outlet to plug into.