Harmonic says new DWDM transmitters deliver more bandwidth to the home

FEBRUARY 15, 2008 -- Without adding new fiber, cable operators can use the new 1310-nm DWDM transmitters to combine up to eight wavelengths to deliver traffic to segmented nodes over their exiting HFC networks, claim Harmonic representatives.

FEBRUARY 15, 2008 -- Harmonic Inc. (search for Harmonic) has expanded its PWRLink transmitter family with the introduction of 1310-nm DWDM forward path transmitters that make it possible to deliver significantly more bandwidth to the home using the existing hybrid fiber-coaxial (HFC) cable network, claims the company. Without adding new fiber, cable operators can use Harmonic's DWDM transmitters to combine up to eight wavelengths to deliver traffic to segmented nodes.

Operators are faced with an increasing demand for downstream bandwidth in order to provision services such as more high-definition (HD) television channels, video-on-demand (VOD), high-speed Internet, and gaming, as well as upstream bandwidth used for user-generated content. To increase the bandwidth available per subscriber, nodes are often segmented to reduce the number of homes passed. However, this results in more nodes per service area, and typically the cable operator needs to deploy additional fiber to serve these nodes, which is expensive. Harmonic claims its new DWDM transmitter eliminates this need for additional fiber. Using the PWRLink transmitters, multiple wavelengths can be combined onto a single fiber for forward transmission up to 30 kilometers, say company representatives.

"The ability to increase downstream and upstream bandwidth in a cost-effective and reliable way is critical to cable operators' success in competing with telco and satellite service providers," contends Sunil Frida, director of HFC solutions and strategy for Harmonic Inc. "Harmonic addresses this need with a variety of solutions, including network segmentation; expansion to 1-GHz, ultra-efficient compression; and switched digital video. The new PWRLink transmitters are part of our portfolio of powerful HFC solutions that are targeted at lowering cable operators' capital expenditures while offering a highly scalable architecture," he explains.

Harmonic says it offers a unique set of high performance video delivery options for cable networks, encompassing compression, stream processing, universal edgeQAMs, on-demand software and servers, and HFC broadband access. Harmonic's range of fiber-based transmission offerings includes analog/digital return path, commercial services, and scalable 1310-nm and 1550-nm CWDM/DWDM digital transport systems, says the company.

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