underwater dream vi iphone case

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underwater dream vi iphone case

underwater dream vi iphone case

CNET también está disponible en español. Don't show this again. Data networking start-up Hammerhead Systems announced Monday that it has scored a second round of funding worth $25 million. This round brings total funding for the Mountain View, Calif.-based company to $43 million. Pequot Ventures, a new investor in Hammerhead, led the round. All first-round investors also participated, including Mayfield, Foundation Capital and Enterprise Partners. Hammerhead Systems, founded in January 2002, builds a switch that helps carriers migrate their existing Frame Relay networks to MPLS (Multiprotocol Label Switching). The product also supports Ethernet services. MPLS is the technology that large carriers will likely use to converge their voice and data networks onto the same network. It allows carriers to more efficiently use their network resources, while still offering private and secure connections for customers.

CNET también está disponible en español, Don't show this again, They also claim it is cheaper to operate, On Monday, the Metro Ethernet Forum, a marketing group made up of equipment vendors and service providers, published results from a study stating that Ethernet could save carriers roughly 23 percent annually on operational costs, While carriers may be interested in taking advantage of some of the benefits Ethernet has to offer, they aren't jumping at the chance quickly, In fact, many incumbent underwater dream vi iphone case carriers are taking a slow, staged approach to launching their metropolitan Ethernet, The main reason is that many have already invested in expensive SONET/SDH gear..

This is where Overture and other multiservice switch makers come in. Overture is targeting service providers that have already built extensive SONET/SDH networks. With the Overture products, carriers don't have to build a separate network to deliver Ethernet services; they can use the same SONET/SDH infrastructure they use to deliver packet-based services. Carriers also are leery about giving up the benefits of their SONET/SDH infrastructure. Unlike Ethernet and Internet Protocol, SONET/SDH has mechanisms built into it that guarantee recovery from failures within 50 milliseconds. These short recovery times are essential for networks that carry voice traffic.

Ethernet by itself doesn't have these mechanisms for recovery and relies on algorithms used in IP, But because Ethernet and IP were designed for data and not voice, these recovery times can take up to several seconds--an unacceptable range when it comes to voice traffic, Overture and other metropolitan Ethernet equipment providers say they support new technology that provides sub-50 millisecond restoration and recovery, Regardless of these challenges, analysts expect the metropolitan Ethernet market to escalate over the next several years, as carriers start to replace older, SONET/SDH gear with new Ethernet-enabled equipment, Infonetics Research underwater dream vi iphone case projects the entire Ethernet equipment market will grow more than 150 percent to $7.5 billion by 2007..

But it won't be an easy road for start-ups, especially because dominant players such as Alcatel, Cisco Systems, Fujitsu and Nortel Networks also offer products. Appian Communications, another small start-up competing in this market, recently ran out of money and closed its doors, according to reports from industry Web site Light Reading. While Overture hasn't announced any big customers yet, it said it has installed gear in more than 100 locations. PPL Telcom, which serves multiple metropolitan areas in Pennsylvania, Maryland and New York, has been using the ISG 5000 for several months. Unlimited Fiber Optics Communications, based in San Francisco, also is installing the ISG 5000 to help deliver Ethernet services to its customers.

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