Telecommunications_Essentials

[ghassen]

this a book for students :
http://www.crystalbutton.com/web-page-buttons/met1.gif (http://rapidshare.com/files/20275389/2007-AW_-_Telecommunications_Essentials--The_Com)
http://ec1.images-amazon.com/images/I/51YM08C6ABL._BO2,204,203,200_PIsitb-dp-500-arrow,TopRight,45,-64_OU01_AA240_SH20_.jpg