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Features wireless communication systems published on the December 1, 2003 issue of the "Telephony" journal.. Design and specifications of the 802.16 metropolitan area network standard developed by Wimax Forum; Applications of wireless-fidelity mesh topologies offered by various companies; Advantages of Profile management designed by Incode Telecom Group Inc.

Discusses the value of deploying metropolitan area networks (MAN). Differences among local area networks, wide area networks and MAN; Potential of the wide-scale deployment of Ethernet in the MAN to provide a dynamic and robust platform to integrate the LAN and MAN; How carriers and enterprise can jointly develop value-added service offerings.

Deals with the fiber optics-based communications networks in the United States. How Williams Communications started using fiber optics; Impact of the model of Extant, a fiber provider on competitive local exchange carriers and Internet service providers; Move of fiber to metro networks; Projections on fiber optics.

Evaluates the broadband wireless access over other access technologies in providing communication solutions for the metropolitan access market. Drawbacks of using fiber optics in access market; Limitations of the xDSL technology as an access solution; Disadvantages of cable modems for voice and data services.

Deals with the wide-area network (WAN) connectivity service launched by Yipes Network, a gigabit ethernet service provider. Speed increases of ethernet according to Ron Young, vice president of marketing and business development at Yipes; Features of Yipes' metropolitan area network service; Cost savings attributed to the WAN service of Yipes.

Focuses on Lynx Photonic Networks Inc.'s emphasis on protecting switching for metropolitan optical networks. Use of silicon-on-silicon planar lightwave circuit (PLC) technology; Other applications for PLC.

Focuses on the optical fiber network transport system of PacketLight Networks company for metropolitan computer networks. How the transport system works; Advantages of the optical fiber transport system; Limitations of intelligent solutions.

Focuses on the resilient packet rings (RPR) standard developed by several equipment vendors to meet the needs of metropolitan area networks by combining the capabilities of Sonet and Ethernet computer networks. Features of RPR; Network design of RPR; Members of the group that developed the product. INSET: Briefly..

Focuses on the tunable lasers developed by researchers working on the Hybrid Optoelectronic Ring Network project or Hornet. Significance of the tunable lasers in metropolitan area networks; Ability of the lasers to hop from one frequency to another according to Hornet researchers; Views on tunable lasers.

Focuses on the routers released by Juniper Networks and Riverstone Networks in response to mini-cores of metropolitan area networks. Features of M5 and M10 routers from Juniper; Capabilities of the RS 3000 optical metro access router of Riverstone; Metropolitan area networks using the routers from Juniper and Riverstone.

Highlights the launching of Atrica company's concept of optical ethernet in the metro area. Topologies supported by the company's system; Benefits of using Ethernet in the metro area; Comments from Frederic Veyssiere, managing director of Innovacom U.S.

Stresses the importance of metropolitan networks to telecommunication. Accomplishments of telecommunication companies in optical communications; Shortcomings of dense wavelength-dimension multiplexing (DWDM); Elements needed to bring DWDM into the metropolitan area on a wide scale.

Reports that telecommunication carriers are planning to deploy application-specific fiber to answer demand from the customer side of the metropolitan area network on metro fiber. Information on MetroCor fiber developed by Corning; Plans if Carrier1 to use MetroCor to build out a metro network in Amsterdam, Netherlands; Divisions of the carrier fiber marketplace. INSET: BRIEFLY.

Reports on Advanced Radio Telecom's commercial launch of its metropolitan area network in Seattle, Washington.

Reports on the development of microprocessors for high-speed data transmission over cable service networks. Single-processor assembly from Stanford Telecom; Design of controllers by Broadcom and Libit Signal Processing; Microprocessors produced by Analog Devices and Hayes Microcomputer Products.