G.711 is a standard audio codec used for compressing and decompressing voice data in telecommunications. It operates at a bit rate of 64 kbps and is widely used in Voice over Internet Protocol (VoIP) systems. G.711 provides high-quality audio by using pulse code modulation (PCM) to convert analog signals into digital format. There are two main variants of G.711: A-law and μ-law. The A-law variant is commonly used in Europe, while the μ-law variant is prevalent in North America. Both variants help maintain audio quality while ensuring efficient transmission over networks, making G.711 a popular choice for voice communication.