| 摘要 |
The apparatus may have: a telecommunication network having a tracking calling terminal and a tracked called terminal; a polled geofencing system associated with at least one predetermined area having a predetermined boundary, the tracked called terminal having a location relative to the predetermined boundary; and at least first and second predetermined ring-back tones having a functional relationship with the at least one predetermined boundary, the first predetermined ring-back tone being utilized when the tracked called terminal is within the predetermined boundary, and the second predetermined ring-back tone being utilized when the tracked called terminal is outside of the predetermined boundary; wherein the at least first and second predetermined ring-back tones alert the tracking calling terminal to a location, relative to the predetermined boundary as determined by the polled geofencing system, of tracked called terminal during a call setup between the designated tracked called terminal and the tracking calling terminal.
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