Patent ID: 6081725
Filing Date: 2000-06-27
Classification: H04M,H04W

Abstract:
A portable telephone system comprising:a caller terminal;at least one base station; anda call destination terminal which is sortable, a base station associated with said caller terminal being provided with:status detection means for detecting a status of said call destination terminal, the status including stages of being busy, out of communication range and capable of connecting; andstatus notification means for notifying said caller terminal of the status of said call destination terminal found by said status detecting means,wherein said status notification means determines whether or not said call destination terminal is busy by sending an inquiry to a base station associated with said call destination terminal, determines whether or not said call destination terminal is outside communication range by determining whether or not a position of said call destination terminal is registered in a base station associated with said call destination terminal, and determines whether or not said call destination terminal is free for connection by determining if said call destination terminal is within communication range and is not busy.