http://www.articleheaven.net en-us editorial@articlealley.com Telephone systems became a part of business communications almost as soon as they were invented more than 100 years ago. For more than a century, all phone calls placed through office communication systems were made the same way. A business executive woul... http://www.articleheaven.net/business-phone-systems-business-phone-equipments-move-to-voip-telephone-systems-1958619.html 17th January 2011