Slydial
Slydial
(ˈslaɪdaɪəl)n
a telephone service that enables the caller to ring a person’s telephone number and leave a voice message on their answering machine but which eliminates the possibility of the caller having to have an unwanted conversation with that person
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014