For those still using analogue or digital phone systems, voice on ISDN circuits has a bandwidth of around 4000Hz. The audio from an analogue phone is sampled at 8000Hz, and because of the nyquist theorem, must be low-pass filtered to 4000Hz. So any frequencies in the audio beyond 4000Hz are lost. Interestingly, the human ear and mind are good at recognising human speech, so this is considered "toll-quality" voice, i.e. good enough to pay for. This is the reason why certain vocalised letters are difficult or impossible to tell apart on the phone. For example, the differences between B, P, T, C, etc. are almost entirely above 4000Hz.
4) An experienced and reputable on-hold messaging provider should also provide you with different music styles that will fit the image of your brand.

For someone to call a company and get put on hold, it is almost an impossible situation. While it may not be a very pleasant step, it is necessary for businesses to handle a large number of calls. Telephone on-hold has a bad reputation for several reasons. This could be due to a radio silence, an aggressive beep, or a poorly designed on-hold message, which does not help in making waiting pleasant. But it is possible to remedy this and use your telephone system, as a powerful promotional and organizational tool! Below are a few ideas and tips on how to go about it!
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