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Ethernet chips for PDH

Posted: 01 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Ethernet? plesiochronous digital hierarchy? plesiochronous digital hierarchy world? PDH world? PDH?

Galazar Networks Inc. has extended its support of Ethernet-centric framers and mappers to the plesiochronous digital hierarchy (PDH) world. The company is offering samples and design kits of two chips that bring Ethernet services to DS1 (T1) and E1 digital circuits. The standard CopperNode chip is intended for customer premises equipment, while CopperNodeHE is an aggregator chip for equipment in the carrier network.

Opportunity lies in the upgrade of wireline PDH networks to Ethernet-centric services, said Matthew Coakeley, director of technical marketing at Galazar. But another potential market is the radio access network and radio point-to-point backhaul applications, where wireless operators are turning to Ethernet for aggregating services. "This will start out slowly, but we see all wireless operators turning to Ethernet and IP networks for their backhaul," Coakeley said.

The HE version of CopperNode is intended for packet handoff with a mix of DS1/E1 and DS3/E3 services, supporting multiple virtual-concatenation groups. In a backhaul termination application, the CopperNode would terminate multiple PDH lines and feed the output to an Ethernet switch or network processor in an edge router. Its interfaces include triple DS3/E3, 21 E1 network interfaces, seven Ethernet/Fast Ethernet and a single GbE interface.

The standard version of CopperNode can handle a mix of Ethernet and TDM at a customer site. Its interfaces include dual DS3/E3, 16 DS1/E1 network-side, six DS1/E1 client-side, three Ethernet/Fast Ethernet and a single GbE interface.

Both versions support the emerging Q-in-Q virtual-LAN tagging standard for L2 aggregation. The chips can support the Generic Framing Procedure or High-Level Data Link Control protocols, as well as the Multi-Link Point-to-Point Protocol.

Chips bring Ethernet to PDH world. CopperNode maps services in aggregation and backhaul termination.

Early this year, Galazar will augment the chips with a full software suite that includes OS-independent drivers with C source code, Device-Manager software that performs monitoring and LCAS control, as well as additional management packages for services and system platforms.

- Loring Wirbel
EE Times

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