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(2) CIRCUIT OPERATION
When the DSHS proprietary telephone receives an IRQ signal from the DSHS and after sending
the key input information to the DSHS and receiving data for the LED control, etc., the DSHS
proprietary telephone will return to the DSHS an acknowledge signal.
(3) RECEPTION
The data from the EMSS is received via the H and L lines along the path shown below.
(4) TRANSMISSION
The data to the EMSS proprietary telephone is transmitted along the following path.
8.5. RESET CIRCUIT
(1) CIRCUIT OPERATION
This circuit is used for transmission of a reset pulse to the CPU (IC2) at the following times,
connecting the telephone line jack and circuit operation.
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