Huawei Completes DSL Retransmission IOP Test

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Huawei, in partnership with major DSL chipset suppliers, including Broadcom Corporation, Lantiq and Ikanos has successfully completed the ITU-T G.998.4-compliant DSL retransmission interoperability (IOP) test.

Huawei, in partnership with major DSL chipset suppliers, including Broadcom Corporation, Lantiq and Ikanos has successfully completed the 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.

To accommodate the rapid demand for video broadband services, broadband carriers seek to provide high-speed and high-quality data and IPTV services through existing DSL resources. The key to delivering stable DSL lines is reducing impulse noise interference. 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.

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.

Broadcom is pleased to have reached interoperability of retransmission and to have contributed essential elements to ITU standardization of this technology. We have demonstrated the outstanding performance advantages of this technique for several years, and now, by working with our partners, we believe re-transmission will become an essential part of IPTV deployments worldwide, said Greg Fischer, vice president and general manager of carrier access for Broadcom Corporation.

As a leading DSL chipset su