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A busy signal (or busy tone or engaged tone) in telephony is an audible call-progress tone or audible signal to the calling party that indicates failure to complete the requested connection of that particular telephone call. The busy signal has become less common in the past few decades due to the prevalence of call waiting and voicemail.
Busy work (also known as make-work and busywork) is an activity that is undertaken to pass time and stay busy but in and of itself has little or no actual value. Busy work occurs in business, military and other settings, in situations where people may be required to be present but may lack the opportunities, skills or need to do something more ...
No frequency is a multiple of another, the difference between any two frequencies does not equal any of the frequencies, and the sum of any two frequencies does not equal any of the frequencies. The frequencies were initially designed with a ratio of 21/19, which is slightly less than a whole tone. The frequencies may not vary more than ±1.8% ...
Thousands of robots at an Amazon warehouse are busy preparing for the Black Friday rush. General Manager of the warehouse, David Tindal, spoke on the branch’s preparation for a busy period.
For most countries, this is followed by an area code, city code or service number code and the subscriber number, which might consist of the code for a particular telephone exchange. ITU-T recommendation E.123 describes how to represent an international telephone number in writing or print, starting with a plus sign ("+") and the country code.
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