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PMC-SIERRA INTROS FIRST MERCHANT GIGABIT ETHERNET MAPPING DEVICE FOR SONET/SDH TRANSPORT NETWORKS.

PMC-Sierra (Nasdaq:PMCS) has introduced the PM5397 ARROW-2xGE, the first physical layer device for efficient mapping Gigabit Ethernet frames into a SONET/SDH transport network.

The ARROW-2xGE supports two Gigabit Ethernet channels and independently maps each of them into a STS-48/STM-16 channelized payload, using the new Virtual Concatenation (VC) and Generic Framing Procedure (GFP) standards to ensure efficient use of the SONET channel bandwidth. The highly integrated ARROW-2xGE will be used in Metropolitan Area Network (MAN) transport equipment, including Multi Service Provisioning Platforms (MSPP) and add/drop multiplexers. Equipment utilizing the ARROW-2xGE allows service providers to offer carrier-class Ethernet transport over existing SONET/SDH networks, leveraging the performance and reliability of SONET/SDH together with the cost efficiencies of Ethernet.

"Although incumbent and competitive service providers are embracing Ethernet as a metro area networking solution, SONET will continue to be the dominant transport architecture for the foreseeable future," said Allen Leibovitch, director of communications semiconductor research at South San Francisco-based research firm, RHK. "The requirement of Ethernet over SONET will drive demand for chipsets like ARROW that can ease the overhead burden of carrying Ethernet over legacy networks."

The ARROW-2xGE is implemented entirely in mainstream 0.18 micron 3.3/1.8 volt CMOS technology and features a small 31 mm x 31 mm footprint, reducing power consumption and simplifying silicon integration. Power consumption is less than 2 watts/port, which offers over 50% power savings over low-density Gigabit Ethernet solutions that use discrete SERDES, Gigabit Ethernet Media Access Controllers (MAC), SONET mapper and FPGA devices. These discrete Ethernet into SONET/SDH solutions do not enable the high density and cost-efficient port pricing required for Ethernet services. Also they do not support standards-based mechanisms to enable efficient independent transport of full rate Gigabit Ethernet channels over a SONET/SDH infrastructure, resulting in network bandwidth being underutilized.

The ARROW-2xGE is the first commercially available device to integrate the Gigabit Ethernet PHY, SERDES and MAC function together with Generic Framing Procedure (GFP) mapping and Virtual Concatenation (VC) for standards-based Gigabit Ethernet into SONET implementations. With VC and GFP support, the ARROW-2xGE enables bandwidth to be provisioned to suit traffic needs enabling services to be offered in cost efficient increments over the same physical Gigabit Ethernet connection. This technique allows several Gigabit Ethernet channels to share the same OC-48 pipe, while still retaining the independence and complete security of each channel. Each Gigabit Ethernet stream can be mapped into any number of STS-1 channels, from one to twenty-one, enabling a number of Gigabit Ethernet channels to be groomed and carried over a SONET/SDH network. In addition, support for these two emerging standards enables inter-working with other standards based equipment. To date, all previous Gigabit Ethernet over SONET implementations have been proprietary.

"All leading transport equipment vendors are building systems that enable Ethernet over SONET/SDH to address trends such as Ethernet private lease line services for multi-national corporations," said Steve Perna, vice president and general manager of PMC-Sierra's Optical Networking Division. "A major barrier to the design of these systems has been the lack of a standards-based mapper that enables Gigabit Ethernet streams to be efficiently provisioned into SONET/SDH channels. The ARROW-2xGE is PMC-Sierra's first in a line of transport oriented framers and mappers to emphasize the new virtual concatenation and generic frame protocol standards."

The ARROW-2xGE provides a direct interface to PMC-Sierra's PM5381 S/UNI-2488 (SONET framer) to provide a two chip solution for two channels of serial Gigabit Ethernet to serial OC-48 (see figure 1). This enables compact, low cost Gigabit Ethernet to SONET muxing as required in Metro DWDM terminals. In addition, the ARROW-2xGE has a glueless interface with the PM5374 TSE-160 (160 Gbit/s STS-1 cross-connect) which provides seamless integration with a cross-connect fabric, including backplane interconnect (see figure 2). Direct fabric interconnect allows simple development of Gigabit Ethernet tributary cards for existing SONET/SDH add/drop multiplexers and cross-connects, enabling data services that have previously required high cost system upgrades.
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Title Annotation:PM5397 Arrow-2xGE
Comment:PMC-SIERRA INTROS FIRST MERCHANT GIGABIT ETHERNET MAPPING DEVICE FOR SONET/SDH TRANSPORT NETWORKS.(PM5397 Arrow-2xGE)
Publication:EDP Weekly's IT Monitor
Article Type:Product Announcement
Geographic Code:1CANA
Date:Dec 17, 2001
Words:665
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