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AMCC mappers, framers aggregate SONET channels

Posted: 30 Aug 2002 ?? ?Print Version ?Bookmark and Share

Keywords:applied micro circuits? sonet channel? transceiver? network processor? microprocessor?

Applied Micro Circuits Corp. is putting an emphasis on the aggregation of multiple Sonet channels to capitalize on the push by incumbent carriers to preserve legacy Sonet backbones, said director of marketing Ken Prentiss.

At successive optical trade shows in September, AMCC will demonstrate the Evros mapper and the Columbia family of multichannel framers. Applications for the S1208 Evros are as broad as SONET add-drop MUXes or edge routers and ATM switches. The device's sweet spot is the mapping of T1 and E1 channels, but it channelizes traffic from DS-0 (64Kbps) to OC-12 (622Mbps). The chip supports all SONET and SDH overhead processing, mapping up to 12 DS3/E3 channels, or up to 336 DS1/Ja and 252 E1 tributaries through virtual tributary paths.

When used in transport applications, the S1208 can locally groom any STS-1 or VT traffic. In data terminal applications, the mapper can terminate such types as ATM, frame relay, and IP/Point-to-Point Protocol. The S1208 is packaged in a 624-pin ceramic BGA, and is slated for general sampling in Q4.

Columbia, the latest in a "rivers" series of framers, is offered in three separate derivatives for different channelization of 10Gb traffic: Columbia 192 is a single-channel OC-192 device; Columbia 4x48 supports four ports of OC-48 (2.5Gbps) traffic; and Columbia 16x12 supports 16 channels of OC-12 (622Mbps) traffic. All devices use the SPI-4.2 interface and LVDS logic I/O.

The Columbia 192, despite its name, can support either SONET OC-192 or GbE traffic. In addition to the SPI-4.2 support on the framer side, the native 10Gb version of Columbia supports SFI-4.2 on the transceiver side, allowing AMCC to support a mix of transceiver module package types such as X2 and Xpac.

Since all three devices use a common pinout and a common plastic 624-pin ball-grid-array package, OEMs can plan for line cards with a variety of port-densities and use a common framer design for all port options. The framers have built-in SONET transceivers supporting rates up to OC-48.

On the system side, the framers offer a 16-bit synchronous microprocessor interface, for direct links to network processors like the AMCC/MMC nP7510. For applications requiring full Sonet fault protection, the devices offer quad 2.48Gbps automatic protection switching ports. Columbia versions are sampling now to close customers, with general availability at year's end. Volume prices for Evros and Columbia will be announced in Q4.

- Loring Wirbel

EE Times

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