What is the correct way to use the Telephone Control function to turn the air conditioner on remotely?

Dial the number connected to the air conditioner and wait for it to ring 5 times. You will hear a 'Beep' sound (when the unit is off), then press '0', '0', '7', '8' in order. The air conditioner will start and you will hear 'Beep, Beep' to confirm. Note that if someone picks up the phone before 5 rings, the telephone control function will not work.