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US5974300A Two-way wireless cellular messaging system 失效
双向无线蜂窝消息系统

Two-way wireless cellular messaging system
摘要:
A two-way wireless messaging system has a cellular network with a mobile switching center for routing messages to base stations, a home location register for storing profiles and a home location register for storing profiles and location information, and a messaging center for receiving, storing and forwarding messages. In the present invention, a set of modular servers is added to add network based message expansion, transaction tracking, directed paging, and user defined services in an incremental fashion.
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