Introduction to Private Telephone Systems; KTS, PBX, Hosted PBX, IP Centrex, CTI, iPBX and WPBX, 2nd Edition
ISBN:9780974278728This book provides an introduction to the different types of private telephone systems, how they op...
Introduction to Private Telephone Systems KTS PBX Hosted PBX IP Centrex CTI iPBX and WPBX 2 nd Edition