HowardFromBroward

Same as a busy signal but faster cadence. Tone sent by the telephone company indicating blocking (no path available to ...

Alerting tone sent by the telephone company prior to certain announcements (e.g. "the number you have reached is not a ...

Tone sent by the telephone company if handset is left off hook. 1400Hz + 2060Hz + 2450Hz + 2600 Hz ...

Generated by a fax machine when answering a call.

Tone heard by calling party if called party's telephone is off hook. 480Hz + 620Hz 2S on / 4S off

Tone heard by calling party while called party's telephone is ringing. 440HZ+480Hz 2S on / 4S off