ATT 1739ATT DIGITAL ANSWERING MACHINE The ATT 1739 Digital Answering System is a standalone device that offers 40 minutes of digital recording time call screening and outstanding sound quality. This welldesigned answering machine also boasts integrated Message Guard backup memory to keep messages from being erased in the case of a power failure. The 1739 Digital Answering System offers a very convenient feature to help make it easier to get your messages remotely from any touchtone phone using its builtin remote access option.