Product category:
Programmable Logic Devices
News Release from: Lattice Semiconductor UK | Subject: Quad Gigabit Ethernet over Sonet/SDH solution
Edited by the Electronicstalk Editorial
Team on 04 February 2003
Ethernet over Sonet solution enables
multiplexer
Sorrento Networks has selected Lattice's quad Gigabit Ethernet over Sonet/SDH system solution for deployment in its access multiplexer family of products.
Sorrento Networks has selected Lattice's quad Gigabit Ethernet over Sonet/SDH system solution for deployment in its access multiplexer family of products for moving Gigabit Ethernet traffic over Sonet/SDH and DWDM networks The complete solution consists of a high-performance Orca 4 Series FPGA plus a Lattice proprietary IP core
This article was originally published on Electronicstalk on 23 Mar 2001 at 8.00am (UK)
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"We integrated the Lattice quad Gigabit Ethernet technology into our Gigabit Ethernet products in order to offer a robust and differentiated GbE transport solution for metro networks", said Demetri Elias, Vice President of Marketing at Sorrento Networks.
"Sorrento's GMGE4-2.5G module is a four-port, fractional- and full-rate Gigabit Ethernet multiplexer that seamlessly connects to a Sonet/SDH network and enables extended GbE transport applications over metro and regional networks.
Lattice's technology has been proven in Sorrento's customer applications since August 2002", commented Elias.
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The Lattice technology was the starting point for Sorrento's Gigabit Ethernet solution, which includes interconnection to both Sonet/SDH and GbE networks, encapsulation of Ethernet frames into the Sonet/SDH format using the packet-over-Sonet/SDH (PoS) methodology, ingress and egress packet buffering at each Sonet/SDH to GbE interface, error checking, and three types of flow control across the fibre link and into the GbE network.
The bridge is implemented in two Orca Series 4 FPGAs.
Each Series 4 device handles two bidirectional GbE streams and performs two primary functions: translation between the Ethernet and the Sonet networks, and flow control (backpressure mechanism) to ensure proper dataflow between the Ethernet network and the Sonet network.
The code programmed into each of the FPGAs is identical and performs all of the handshaking between the GbE devices and the Sonet/SDH devices.
Also included in the FPGA core is the handling of rate mismatches between the GbE networks on opposite ends of the Sonet/SDH fibre connection, control of the data buffering, flow control between the two GbE networks on opposite ends of the Sonet/SDH fibre connection, and the optional discarding of errored packets received from the GbE MAC before transmission across the Sonet/SDH fibre.
Programmability provides users with the flexibility to introduce changes to their design quickly based on changing specifications and changes in customer requirements.
"Lattice is pleased to provide Sorrento with the tools for quickly deploying GbE over Sonet/SDH technology in their GigaMux platform", said Stan Kopec, Vice President of Marketing at Lattice Semiconductor.
"The Orca Series 4 FPGAs were designed from the start for complex networking applications, like GbE over Sonet/SDH.
It is the best FPGA available for networking applications, and combined with our networking and system-level IP expertise, provides the best value in the communications industry".
Orca FPGAs provide customers with the ideal platform and flexibility to implement emerging standards like data over Sonet/SDH, while not being limited by the inflexibilities and long turnaround times of ASSPs.
The quad Gigabit Ethernet over Sonet/SDH capability from Lattice is the leading solution available, allowing customers to efficiently map four channels of Gigabit Ethernet into a 2.5Gbit/s Sonet/SDH pipe.
"We welcome challenges like this because we have the answers that get customers to market quicker", added Kopec.
Sorrento Networks' GigaMux is a metro and regional dense wavelength division multiplexing (DWDM) platform that transforms any fibre plant into a high-performance, multiprotocol transmission network with up to 64 times the transmission capacity.
GigaMux is a compact, flexible, and cost-effective system based on a "pay-as-you-grow" architecture.
Working in conjunction with GigaMux is the EPC product family, consisting of subrate aggregation multiplexers that increase bandwidth utilisation by combining a wide variety of traffic for transmission over a single wavelength, including Gigabit Ethernet, Escon, Fast Ethernet, Fibre Channel and Sonet/SDH channels.
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