What is G.711

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G.711, also known as Pulse Code Modulation (PCM), is a commonly used waveform codec. G.711 uses a sampling rate of 8,000 samples per second. Non-uniform quantization (logarithmic) with 8 bits is used to represent each sample, resulting in a 64 kbit/s bit rate. G.711 defines two main compression algorithms, the ?-law algorithm (used in North America & Japan) and A-law algorithm (used in Europe and the rest of the world). A-law encoding takes a 13-bit signed linear audio sample as input. μ-law encoding takes a 15-bit signed linear audio sample as input.

G.711 is simple, and provides short delay and high audio quality. G.711 has high data rate and is sensitive to errors on channels.

The UMG8900 supports G.711, A/μ conversion, and interworking with the PSTN.

Other related questions:
What is G.711
G.711, also known as Pulse Code Modulation (PCM), is a commonly used waveform codec. G.711 uses a sampling rate of 8,000 samples per second. Non-uniform quantization (logarithmic) with 8 bits is used to represent each sample, resulting in a 64 kbit/s bit rate. G.711 defines two main compression algorithms, the ?-law algorithm (used in North America & Japan) and A-law algorithm (used in Europe and the rest of the world). A-law encoding takes a 13-bit signed linear audio sample as input. μ-law encoding takes a 15-bit signed linear audio sample as input. G.711 is simple, and provides short delay and high audio quality. G.711 has high data rate and is sensitive to errors on channels. The UMG8900 supports G.711, A/μ conversion, and interworking with the PSTN.

Differences between G.657A2 and G.657B fibers
G.657 optical fibers provided by Huawei are named G.657B optical fibers and G.657A2 optical fibers. G.657B optical fibers are short-jacket optical fibers defined in ITU-T G.657 (12/2006). According to ITU-T G.657 (11/2009), these fibers are classified into G.657A1, G.657A2, G.657B2, and G.657B3 optical fibers. G.657B optical fibers provided by Huawei and the G.657A2 optical fibers are fully compatible and can be interconnected. These optical fibers are fully compatible with G.652D optical fibers. The compatibility between G.657B optical fibers that are not provided by Huawei and G.657A2 and G.652D optical fibers needs to be verified.

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