Centrex or PBX : the impact of IP
John R. Abrahams, Mauro Lollo · Thammasat University Digital Collections · 2003
Introduction to Centrex. Internet Protocol Centrex. IP-Centrex Systems and Applications. IP-PBX Systems and Applications. IP-Centrex: Prospects and Pilot Trials. Evaluating IP-Centrex. Implementing and Managing IP-Centrex. Marketing and Selling IP-Centrex. Appendices.