You may have set an Alert Tone for the FTO's programmed. There are 10 unique Alerts similar to Cell Phone Ringer Tones and 10 levels of Volume independent of master volume level. Set the Delay to INFINITE so you may hear the call after FTO. To resume FTO Standby, turn scroll knob after FTO.
No this is a dispatch two-tone transmitted by the fire board. I heard it on my scanner. There was no activity anywhere in the county and this two-tone QCII goes off out of the middle of no where and no voice after it. Strange ??