VoIP & SIP Difinitions, Terms and Acronyms Explained Understand VoIP and business calling terms: fast, clear, and jargon-free. DTMF (Dual-Tone Multi-Frequency): Definition and How It Works Jitter MOS (Mean Opinion Score): Definition, Ranges, and How to Improve VoIP Call Quality PBX (Private Branch Exchange) Benefits and Features RTP (Real-time Transport Protocol)
