Monday, July 26, 2010

Huawei and Silicon Vendors Complete DSL Retransmission Test

Huawei, in partnership with major DSL chipset suppliers, including Broadcom, Lantiq and Ikanos, successfully completed the industry' s first ITU-T G.998.4-compliant DSL retransmission interoperability (IOP) test. The test proves that DSL retransmission technology is mature, with good IOP among chipsets from major DSL chipset suppliers.

ITU-T G.998.4 retransmission technology is an important milestone for DSL technology because it improves DSL stability by diminishing impulse noise, lowering high bit error rates (BER), and reducing the number of dropped VoIP calls, and frozen, blank, or paused screens. This is seen as a key to ensuring high-quality IPTV services over DSL.

In this Huawei-led DSL retransmission test, chipsets from different suppliers passed the IOP test, even in high impulse noise environments. In the ADSL2+ IOP test between Broadcom and Lantiq, the payload throughputs showed little difference between retransmission features enabled with impulse noise, and retransmission features without impulse noise. The maximum packet delay caused by retransmission is approximately 6 milliseconds, and the anti-impulse-noise capability of the retransmission technology is more than 10 times that of traditional INP technologies.

Mr. Deng Xiaohe, Chief Officer of Access Network Product Line, Huawei, said, "DSL retransmission technology will help carriers worldwide to construct best-in-class ultra-broadband, ultra-stable DSL networks. We believe that through our joint efforts with industry-leading chipset suppliers, this technology will enable carriers to roll out new services that meet the needs of today' s consumers who seek not only higher bandwidth and richer services but better broadband service stability."

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