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DIALING/COMMUNICATION CONTROL
3 - 1
3
3. DIALING/COMMUNICATION CONTROL
3.1 Circuit Connection and Procedure to Change Mode
3.1.1 Dial call-up transmission to a telephone circuit
START
END
Detecting a calling signal?
Detecting an off-hook signal?
DC circuit closed
After detecting the dial tone,
or 3.3 seconds elapsed
Selection signal sent out
Standby state
NO
NO
YES
YES