Huawei is better known for making telecom-network equipment, a market where it has used aggressive discounts to become one of the top three vendors by sales.

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Diane Myers, a principal analyst with Infonetics Research, says Genband had a 15.2% revenue share of the global VOIP equipment market for telecom providers in 2011, trailing just slightly behind closely held Chinese vendor Huawei Technologies Co.

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At the same time, Cisco's share of its core market, telecom networking equipment, has fallen from 60% to below 50% in some major sectors.

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Some market watchers had expected this sector to bottom out today, but the overall market tone was negative and the telecom equipment makers could not resist the downward tide.

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