Ethernet controllers rise to higher-performance level

Shelton, Conn. — TranSwitch Corp. announced a single-chip Ethernet/VLAN/MPLS switch that the company said can be used in place of LAN-class switches and NPUs.

The Ethernet/virtual local area network (VLAN)/ multiprotocol label switching (MPLS) Envoy-XE switch can be used for traffic managing Ethernet in the first mile (EFM) and in access applications. It can also be used for offload or replacement of traditional NPU functions like quality of service (QoS) at Layer 2 (VLAN, MPLS) and Layer 3 IP type of service (ToS), and VLAN service statistics. The new device is a suitable fit in access and edge switches and routers, multiservice provisioning platforms (MSPPs)/multiservice transport platforms (MSTPs), IP-DSLAMs, and base transceiver stations.

These devices add the ability to perform wire-speed Ethernet, VLAN, and MPLS switching for 75 ports together with traffic management including Metro Ethernet Forum (MEF)- and Internet Engineering Task Force (IETF)-compliant dual leaky bucket policer and advanced scheduling in a single chip, said Brian Stroehlein, product marketing manager for TranSwitch. Like Envoy-CE2/-CE4 , it aggregates Fast Ethernet (FE) and Gigabit Ethernet (GE) ports to a SPI-3 interface, but Envoy-XE's switch and traffic management blocks enable aggregation to one or more Ethernet ports as well.

“Envoy-XE is the first device in the MAN/WAN ASIC market to offer the complete carrier-class feature set demanded by OEMs,” Stroehlein said. “This is not just a LAN chip repackaged and repurposed for carrier equipment use. Our device's Optical Interface Forum (OIF) System Packet Interface (SPI), Level 3 allows for glueless connection to popular NPUs and Sonet/SDH framer/mapper devices, thus shortening development time and lowering costs,” he said.

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Samples of the Envoy-XE (TXC-06920) will be available in Q3. Volume will follow by the end of the year. The device is packaged in a 772-pin plastic BGA. Pricing is less than $150.00 each in 1,000-piece quantities. Click here for the Envoy-XE data sheet .

TranSwitch Corp. , 1-203-929-8810,

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