Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: International Direct Dialing ( IDD ) is an international telephone call dialed by the caller rather than going via an operator .
A:
International direct dialing ( IDD ) or international subscriber dialling ( ISD ) is placing an international telephone call that is dialed directly by a telephone subscriber , rather than by a telephone operator .