What are the common terms for IP based phones?
SIP: “Session Initiation Protocol” – A standard for an interactive session allow for video, voice, instant messaging, online games uses. PSTN: “Public Switched Telephone Network” – A globally interconnected network of voice communication sometimes referred to as “Plain Old Telephone System” (POTS). This network consists of analog copper lines throughout the world. PBX: “Private Branch Exchange” – A private telephone system that connects to telephone company lines, allowing many extensions to share few lines, and make use of features such as: direct inward dialing, voicemail, and auto-attendant, just to name a few. IVR: “Interactive Voice Response” – Voice or touch-tone interaction, can reduce or eliminate live operator direction and assistance. DID: “Direct Inward Dialing” – Allows each individual extension on a PBX to have a designated seven digit number, even though there are much fewer lines; this allows outside callers to access the desired party directly, bypassing live or automat
