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TranSwitch controller deployed in ZTE's Fast Ethernet cards

Posted: 06 Jan 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Envoy-CE2? Ethernet controller? Fast Ethernet? interface card? ZXR10?

TranSwitch Corp., a provider of high-speed semiconductor solutions for voice, data and video communications, announced that ZTE Corp. a player in China's telecommunications equipment market, is deploying its Envoy-CE2 Ethernet controller in Fast Ethernet service interface cards used in their ZXR10 carrier-class IP/MPLS routers.

"ZTE needed a proven, carrier-class Ethernet controller for its Fast Ethernet service interface cards," said Weipu Li, hardware director of ZTE's Datacom System department. "TranSwitch's Envoy-CE2 integrated gluelessly to our custom packet forwarding ASIC via a SPI-3 packet interface."

The SPI-3 interface can operate at up to 25MHz, allowing throughputs of up to 4Gbps, and it directly interfaces with the Intel IXP2350 and other network processors. The support for master mode on the SPI-3 allows a glueless interface with standard SPI-3-based VCAT/GFP mappers for delivery of Ethernet-over-SONET/SDH. Per-port flow control on the SPI-3 interface prevent head-of-line blocking, and large on-chip buffers enable extended distances with flow control.

The Envoy-CE4 and Envoy-CE2 support jumbo (9,600bytes) and super jumbo (12,000bytes) frames on both the Fast Ethernet and Gigabit Ethernet interfaces. These Ethernet controllers provide port muxing and a customer-programmable routing tag encapsulation.

The Envoy-CE4 incorporates four media access controllers (MACs), while the Envoy-CE2 contains two MACs. Each MAC is configurable at boot-up as a single Gigabit Ethernet (10/100/1000-compliant) or octal Fast Ethernet (10/100-compliant) interface, thereby enabling the devices to support up to 32 Fast Ethernet ports or four GbE ports. An extended Fast Ethernet buffer mode allows the Envoy-CE4 to support eight Fast Ethernet ports with 31KB of ingress and 16KB of egress buffering. Meanwhile, the Envoy-CE2 can support four Fast Ethernet ports in this mode.

Brian Stroehlein, product marketing manager for TranSwitch's Envoy family, commented that the Envoy-CE2 and Envoy-CE4 have proven themselves in dozens of OEM products since their introduction in March 2004. "ZTE is going global with a wide range of telecom and datacom equipment. These design wins are an important milestone for the Envoy family in the broadband access market," Stroehlein said.

The standard and green versions of the Envoy-CE4 and Envoy-CE2 are rated for industrial temperature range (-40C to 85C).

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