glossary of Terms
PABX - Private Automatic Branch eXchange: Most call handling is done automatically suiting medium to large systems.
Key System - Commander style phone system where programmable keys are used to make and take calls for small office applications.
VOIP - Voice over Internet Protocol
SIP - Session Initiation Protocol
ISDN - Integrated Services Digital Network
PSTN - public switched telephone network
TAPI - Telephony Application Programming Interface
CTI - Computer telephony integration
BP - Business Phone
DECT - Digital Enhanced Cordless Telecommunications
DPNSS - Digital Private Network Signalling System
QSIG - ISDN based signalling protocol
