http://www.articleheaven.net en-us editorial@articlealley.com Communications systems have become much more advanced than in the old days when telephones or telegraphs were used. It all started with fibre optic cable, which could replace copper cable in many instances. Fibre optic cable was much more efficient and c... http://www.articleheaven.net/advance-communications-systems-2048964.html 18th February 2011