AT&T has manuals for many of their consumer (residential) cordless and corded phones and answering machines available for download in Adobe Acrobat format. Just follow the link and find your model.
[Click to Find AT&T Owner’s Manuals](http://telephones.att.com/telephones_ui/support/dsp_manuals_list.cfm “AT&T Owner’s Manuals”) (att.com)