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Re:Why don't cell phones have a dialtone? by j-m-o on Friday April 12, 2013 @05:42PM (#5541232)
The term you're looking for is 'ring-back', and it's original use seems to have gone the way of the do-do in North America.

Most of the PBX/VoIP systems I've worked on (North and South America) provide one arbitrarily to give the caller the warm and fuzzies, regardless of what's actually happening to that call leg.

Re:Why don't cell phones have a dialtone? by kalleboo on Friday April 12, 2013 @07:01PM (#5541617)
And as a mobile subscriber you can usually pay for a custom "ring-back" tone. So you can bother anyone who calls you with the latest Rihanna hit.