This is the simplest and rather basic rule in rendering a good customer service. A customer service hotline of a company selling a product, such as pizza for a home-delivery service, anchors its business success on its telemarketers to answer an incoming call immediately, politely, and expeditiously.
The calling customer should hear a voice tone that has an air of friendliness regardless of whether the answering party’s voice is naturally modulated or high pitched. It will take a little practice on the part of the employee tasked to do this to achieve that audibly acceptable tone. This should be practiced during the orientation phase of the new recruit.