Apostolos Zervos is author of this article on . He is a Strategy and Marketing Consultant for VoIP & Multimedia Networking Services and Applications. You may find more information about his recommended voip hardware picks and solutions at here.
VOIP PHONES Combining the Siemens Gigaset C470IP with the Asterisk PBX can create a powerful, robust and flexible solution... Source : What Is Voip Phone Pg. 15
