Riding on cutting-edge technologies such as flex oDSP, super SD-FEC, and flex modulation format, this field trial achieved a record-breaking transmission distance of 1, 500 km using a super-channel PDM-16QAM-based high spectral efficiency solution, and a second record-breaking transmission distance of 3, 325 km using a super-channel Nyquist PDM-QPSK-based ultra-long-haul solution.

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One London-based computer expert said the development should help light-based data transmission go mainstream in server farms.

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Their conclusion is that the switching and transmission costs for IP-based telephone networks are much lower than for switched circuit telephone networks.

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It bought Birfield, a British rival with better technology, and later extended its control over Uni-Cardan, a German-based maker of transmission gear for carmakers in continental Europe.

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Construction, maintenance and power transmission requirements will be much more costly than land-based installations, requiring even higher subsidies and consumer pain.

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The Cleveland-based Eaton Corporation developed the hydraulic transmission.

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Sabre Industries, which provides wireless towers, monopoles and transmission structures, and Nobao Renewable Energy, a Shanghai-based provider of heat pumps used to cool commercial buildings, did not price as expected.

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With distributed transmission, the signal is delivered to each of its transmitters via fixed channels (land-based delivery).

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They then analyze how the remaining major cost components, switching and transmission for both types of networks and interconnecting with the switched circuit network for the IP-based networks, change with the change in technology.

CNN: IP telephony is the "in" thing these days, but should it be?