| 摘要 |
PURPOSE:To prevent a speech channel from being cut in the case of deviating from an area communicable by a radio telephone salve unit and to eliminate the need of recalling. CONSTITUTION:This equipment is composed of a communication control procedure execution part 29 for checking data communication between a radio telephone main unit 21 and the radio telephone slave unit 22, a number-of-times measuring part 30 for measuring the number of times of errors, a message transmission part 26 for holding a line on a communicating party side and reporting a message to a communicating party when the number of times of the errors becomes equal to or more than the stipulated number of times continuously for the fixed period time, a timer management part 31 for measuring various kinds of elapsing time, a channel switching part 25 and a transfer destination memory part 44 for storing a transfer destination. When the number of times of the errors becomes equal to or less than the stipulated number of times continuously for the fixed period of time, the communication is restarted. In the case of not equal to or less than the stipulated number of times, transfer is performed to the transfer destination set in the transfer destination memory part 44 and the communication is continued.
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