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来源:LM317 Electronics Components编辑:Pimoroni时间:2021-06-15 15:26:50

Power-line networks have the characteristics necessary to provide for broadband, bidirectional data-transmission services. But to realize global implementations for such systems the industry must demonstrate coexistence with established data-transmission systems, including radio systems. Furthermore, any sustainable standard must be flexible enough to serve all sectors of the market.

We won't see a first draft of the [10-Gbit Ethernet] specification until October or November of this year,” said Lee, who is also director of product marketing at Extreme Networks Inc., in Santa Clara, Calif. But before that, I expect a lot of companies will announce or talk about10-Gbit, including next week [at Networld+Interop].”

Indeed, chip makers and OEMs are rushing out their 10-Gbit Ethernet products to capitalize on what is expected to be a $1 billion market by 2004, according to the Dell'Oro Group Inc., of Portola Valley, Calif.

C0603CH1E100D_TDK Corporation_Ceramic Capacitors

But even beyond that sizable market opportunity, observers say that 10-Gbit Ethernet could have a profound impact on the network, possibly posing a major threat to the traditional WAN-based technologies: Asynchronous Transfer Mode (ATM) and synchronous optical network (Sonet).

Ethernet carries LAN-based data traffic to the WAN, which in turn transports the traffic to high-speed, nationwide backbones via ATM and/or Sonet. Both ATM and Sonet are proven fiber technologies but are costly to deploy.

On the other hand, 10-Gbit Ethernet, while transporting data over fiber networks at 10 times the speed of today's 1-Gbit Ethernet lines, does so at only two to three times the cost, which is still only about one-fifth the cost of deploying ATM or Sonet, according to analysts.

C0603CH1E100D_TDK Corporation_Ceramic Capacitors

10-Gbit Ethernet will steal some opportunities from the WAN, particularly ATM,” said Kim Funasaki, an analyst at International Data Corp. in Mountain View, Calif. However, there's a large installed base of ATM and Sonet in the network. As a result, 10-Gbit Ethernet, ATM, and Sonet will most likely co-exist.”

We don't think ATM or Sonet will go away,” said Steve Perna, vice president and general manager of the Optical Network Division at PMC-Sierra Inc., of Burnaby, B.C., which makes a wide range of chips for ATM and Sonet networks (see May 4 story).

C0603CH1E100D_TDK Corporation_Ceramic Capacitors

In fact, we believe that Broadcom's announcement is a joke,” Perna said. Broadcom only provides one piece of the overall puzzle in 10-Gbit transmission. To provide a true 10-Gbit Ethernet transmission, you need more than just the transceivers, such as a MAC, Ethernet-based framing devices, and Level 4 packet-over-Sonet processing,” he said.

Broadcom executives responded that the Irvine, Calif., company's intention is to address only the transceiver side of the equation.

The chip will allow networking equipment makers to design and build networks using the well-known Ethernet networking protocol that are 10 times faster than those available today.

Ethernet is the most widely used local area networking technology.

We've developed a breakthrough technology that substantially lowers the cost,” Nicholas said.

The fast-growing optical networking market is drawing companies such as Lucent Technologies Inc., and Cisco Systems Inc., and a host of start-ups, which are racing to develop technology to boost the speed of local area, wide area and so-called storage-area networks.

Nicholas said Broadcom was now offering the chip, technically known as a 10-gigabit-per-second Ethernet transceiver, on a sample basis at $88, compared with about $1,300 for existing chips using more expensive materials and manufacturing processes. He said volume production could begin immediately.

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