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Encyclopedia > Busy signal (telephony)

A busy signal (or engaged tone) in telephony is an audible or visual signal to the calling party that indicates failure to complete the requested connection of that particular telephone call.

  • a reorder tone, (sometimes called a fast busy signal), indicates that no transmission path to the called number is available.
  • an otherwise unspecified busy signal indicates that the called number is occupied or otherwise unavailable
  • this tone sometimes occurs at the end of a call to indicate the other party has hung up.

Many different countries have different signalling tones that act as "busy signals".


References


  Results from FactBites:
 
The OpenPhone Project—Internet Telephony for Everyone! (4102 words)
Telephony can be thought of as having two major parts: the audio channel used to communicate and the signaling channel(s) used to control the audio channel.
The local loop uses analog signals to carry your voice to the CO, where it is digitized and sent to the CO on the other end of the call.
This has the advantage of ensuring that the signals are reproduced accurately at the other end of the connection regardless of the audio codec needed, and it reduces the bandwidth needed to convey the data.
Busy signal (telephony) - Wikipedia, the free encyclopedia (130 words)
A busy signal (or engaged tone) in telephony is an audible or visual signal to the calling party that indicates failure to complete the requested connection of that particular telephone call.
a reorder tone, (sometimes called a fast busy signal), indicates that no transmission path to the called number is available.
Many different countries have different signalling tones that act as "busy signals".
  More results at FactBites »


 
 

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