The identical office mode between office channel change manner in the portable communication system and the exchange station null which possesses the office channel change function between identical office

摘要

PURPOSE:To obtain a channel switching function across areas different in radio system in the same station by adopting a conventional inter-system and inter- station channel switching processing and starting this processing to actually realize the inter-system intra-station channel switching. CONSTITUTION:When a mobile terminal 2 is moved to another area E2 different in radio system in the same station in the case speech is carried out between a subscriber terminal 9 and the mobile terminal 2 in an area E1, the inter-system and inter-station channel switching processing is activated, and a channel switching trunk 7 is changed to temporarily send a signal sent to a station in use to a loop trunk 5-1 of its own station. The signal is fetched to its own station through a loop back trunk 5-2 to be a pair for this loop back trunk 5-1 and the inter-station interface processing is performed, and thereafter, the inter-system and inter-station channel switching processing is executed in a station 1. Then, the signal sent to its own station accesses the mobile terminal 2 in the area E2 through a bidirectional trunk 4-2 for the area E2 and a radio base station 3-2.