| 摘要 |
A telecommunication system to operate a selected operating device including a digital code generating device to generate first and second coded signals having an actuating input to receive an actuating signal, a digital coded signal output where upon receipt of an actuating signal at the actuating input the digital code generator supplies the first coded signal to the digital coded signal output, and a receiver code input; receiver connected to the digital coded signal output having a receiver input to receive the first and second coded signals, a receiver code output connected to the receiver code input, and receiver code generator device to generate first receiver code signal to the digital code generator receiver code input in response to receipt of the first coded signal and supply a second receiver coded signal to the digital code generator receiver code input in response to receipt of the second coded signal where the first receiver coded signal causes the digital code generator to generate the second coded signal at the digital coded signal output which causes the receiver code generator device to generate the second receiver code; latch means operated by the digital code generator to actuate the operating device upon receipt of the activating signal; and a third receiver code generator to selectively provide a third receiver coded signal at the receiver code output to be received at the receiver code input to deactivate the latch means to terminate operation of the operating device.
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