Introduction to Private Telephone Systems: KTS, PBX, Hosted PBX, IP Centrex, CTI, iPBX and WPBX, 2nd Edition This book covers private telephone systems including key telephone systems (KTS), central exchange (Centrex) systems, private branch exchange (PBX), and computer telephony integration (CTI). An overview of voice over Internet protocol (VoIP) and you will discover how private [...]
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