What is Packet Loss?

Understanding Packet Loss

A technique called Packet Loss Concealment (PLC) is used in VoIP communications to mask the effect of dropped packets. Packet loss occurs when packets fail to reach their destination during transmission across networks, causing data gaps that can impact application performance, especially for real-time services like VoIP and video streaming. PLC techniques attempt to minimize the audible effects of missing packets by interpolating or predicting missing audio data. Packet loss considerations are addressed in standards like ITU-T G.711 Appendix I and various QoS frameworks. Organizations manage packet loss through Quality of Service mechanisms, network optimization, redundant paths, forward error correction, and adaptive codecs. For example, a unified communications system might implement QoS tagging and prioritization for voice traffic, use codecs with built-in packet loss concealment, and monitor network paths for packet loss to ensure high-quality voice communications across the enterprise. Related terms: VoIP, Quality of Service (QoS), Jitter, Latency, Forward Error Correction, Real-time Transport Protocol (RTP), Network reliability, Buffer.