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Gigabit Ethernet radio links for E-band: 71-76/81-86 GHz, and 92-95 GHz


ElvaLink Announced Availability of Gigabit Ethernet Mm-wave Links

ElvaLink demonstrated the New 1.25Gbps Full-Duplex Radio Link

Solon, OH, USA - March 28, 2005 - ElvaLink LLC, an associated partner with ELVA-1 and innovative supplier of millimeter wave wireless network equipment, is announcing the availability of a new PPC-1000 series of Gigabit Ethernet point-to-point millimeter wave radio links.

The Gigabit ElvaLink radio bridge was designed for a wide range of applications such as mobile backhaul, business network, FSO backup, IP network and emergency recovery network. The operating frequencies cover 71-75 GHz, 81-86 GHz, and 92-95 GHz. These are FCC licensed bands recently released by the FCC for commercial use in wireless point-to-point communications.

ElvaLink PPC-1000 Gigabit Ethernet at field testing Photo of ElvaLink PPC-1000 Gigabit Ethernet without antenna radome

ElvaLink's PPC-1000 is a full-duplex Gigabit point-to-point link especially designed according to FCC requirements. It provides interconnection between remote LAN segments at ultra high speed and utilizes Gigabit Ethernet protocols, which is the evolving standard for switches and routers available from a variety of telecommunication equipment manufacturers. One full-duplex Gigabit Ethernet link provides 1.25 gigabit-per-second connectivity that is the equivalent of approximately 650 T1 lines or 1,000 DSL connections. The PPC-1000 product has 1000 Base-SX connections at each end of the wireless link and transparently establishes the link outputs. The resulting connection can replace a fiber-optics cable physically connected end-to-end. The wireless mm-wave Gigabit link provides fiber equivalent performance, reliability and security but with no high deployment cost associated with outdoor fiber installations.

PPC-1000 links have remote management as well as parameter monitoring capabilities. A twisted pair patch cable connected to any RJ-45 socket within the LAN will allow remote SNMP management and parameter control of a set of PPC-1000 links from a central location.

The Gigabit Ethernet point-to-point millimeter wave radio links have been designed with compact parabolic Cassegrain antennas of 30 and 60 cm diameters. The 60 cm antenna has a 0.4° beam width and 50 dB antenna gain parameters, which are fully compliant with FCC specification requirements for E-band communication. Note, the FCC recently allowed the use of smaller, less expensive antennas with a minimum antenna gain of 43 dBi and a 1.2 degree half-power beamwidth available on the PPC-1000 ElvaLink systems as well.

The PPC-1000 operating distances vary from 1 to 4.5 miles or 1.5 to 7 km for varying weather conditions depending of the link frequency and rain intensity. One can calculate the distance versus rain attenuation using FCC Bulletin Number 70, “Millimeter Wave Propagation: Spectrum Management Implications” July, 1997. Namely, for example, in the so called B-zone of the US rain map the relevant guaranteed PPC-1000 link distances will be from 1.2 mile (2.0 km) for 99.995% weather availability up to 6.5 km for 99.9% availability. Meanwhile, the carrier-class 99.995% availability corresponds to 0.4-hour outage per year caused by weather factors, and the enterprise-class 99.9% availability means 8.8 hours outage per year.

It has been proven experimentally that in actual practice the operating distance for a mm-wave link could be longer for the same availability than the above mentioned theoretical distance estimations. The explanation is that the distances are generally calculated assuming that rain intensity is equal along the entire distance. But rain cloud intensity varies along the distance between the link antennas. For instance, there might be heavy rain at one end of the link and it may not be raining at all at the other end. This natural factor improves overall link performance during actual rain conditions and allows extending the operating distances while keeping the same level of link availability.

“The first PPC-1000 link has already been sold to an undisclosed international telecom giant, and their representatives even participated in PPC-1000 commissioning tests in Feb 2005,” said Daniel Korneev, President of ElvaLink. “We are optimistic and we expect a good response from the market to our new PPC-1000 Gigabit Ethernet links. We appreciate the opportunity to bring to thousands of US commercial customers online fiber-like capacity using ElvaLink millimeter-wave wireless links”.

Read more about PPC-1000 (PDF, 260K)

About ElvaLink

ElvaLink LLC is a company specializing in high-speed radio communication devices, with headquarters in Solon, OH. Recently, ElvaLink LLC has aggressively expanded its product range to mm-wave telecom products, such as 60 GHz, 70/80 GHz, and 94 GHz high transfer rate Ethernet LAN bridges, enabled by patented company technology. The point-to-point, high performance ElvaLink PPC-1000 Series of mm-wave digital radios provide exclusive last mile solutions for businesses, college campuses, ISPs, government agencies, and may also serve as inexpensive back-up. The ElvaLink wireless link is a new fiber optics substitute for urban inter-building high-speed data services. Company product development roadmap includes next generation of 1.25Gpbs Gigabit Ethernet radios for 70/80 GHz and 94 GHz bands that are available since Q1/2005.

Contact Information

ElvaLink LLC
5900 Harper Rd., #102
Solon, OH 44139-1866, USA
Tel: 1-440-519-0410
Fax: 1-440-519-0830

About Elva-1 Millimeter Wave Division

Founded in 1993, ELVA-1 Millimeter Wave Division is based in St.Petersburg, Russia. Since the year 2000, ELVA-1 has aggressively expanded its product range to mm-wave telecom products, such as 42GHz, 60GHz, 70/80 GHz and 94GHz transmitters and receivers, antennas with a high gain factor and other advanced products. Applications for these products include mm-wave industrial measurement systems, 100Mbps Ethernet wireless LAN bridges, MVDS out-door units (transmitters and receivers), and LMDS communication systems, radar front-ends, microwave level sensors, millimeter wave security imaging systems and other innovative areas. The companies product development roadmap includes next generation 1.25Gpbs Gigabit Ethernet radios for 71-76/81-86 GHz and 94GHz bands to be available first quarter 2005.

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