In today's world, it seems that almost any topic is open for debate. While I was gathering facts for this article, I was quite surprised to find some of the issues I thought were settled are actually still being openly discussed.
So just what are Ring back Tones? In simple terms, when you call someone you usually will hear a beep letting you know that you have been connected and the phone is ringing - this is the ring back tone.
A more technical explanation is that the ring back tone is a status indication that the number dialed is available (ie the receiving line is in service and not busy). This requires that the proper connections through the network or networks between the caller and the callee's audio devices are either made, or are available to be made, and the phone call will be connected if the call is picked up - either by an answering service or a person.
Once the receiving party has either answered your call, or you call was picked up by an answering machine or network voice service, the ring back tone stops. (awwww). The actual sound of a ring back tone will depend on your country and/or carrier. Again, to get technical, in North America (United States and Canada), which are within the North American Numbering Plan (NANP), the standard PSTN ringback tone is generated by summing a 440-Hz tone with a 480-Hz tone and applying these to the telephone line in a two-second on and four-second off pattern.
If you don't have accurate details regarding , then you might make a bad choice on the subject. Don't let that happen: keep reading.
The interference due to the difference in frequency between the two tones causes a 40-Hz beat, and the tone combination produces the common warbling "ring ... ring ... ring" sound. The ring back tone may be generated by the switch serving either the called party or the calling party, but it is not generated by the called telephone instrument or PBX. The ring back tone generally starts and stops at the same rate as the ringing tone of the called telephone, but generally is out of phase, i.e., staggered in time.
Finally we get to the fun part about ring back tones - rather than the standard 'ring ring' tone we just talked about above, cellphone carriers have made it possible to personalize the ring back tone that your cell phone service will play when a caller is waiting for you or your machine to pickup. A huge selection of current (as well as classic) music and audio clips are available for selection on your cell phone to play as the ring back tone. Customizing your ring back tones in this manner is available through subscription services with your particular carrier, and is generally billed as an additional charge per tone selected.
The best thing about ring back tones is that you can customize the tone played depending on the caller - it is possible to select up to 100 or so active ring back tones at any given time, each programmed so that different callers hear different tones/songs/clips, or programmed so that different tones will play dependent on the time of day.
For more information about customizing your cell phone service to play ring back tones you can often find the menu commands with a web search for your cell phone carrier and 'ring back tones'.
As your knowledge about continues to grow, you will begin to see how fits into the overall scheme of things. Knowing how something relates to the rest of the world is important too.