Integrated Solution combines E1 LIU/framer and VT/TU mapper.
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Press Release Summary:
For connecting to metro core and metro access networks, XRT86SH221 (Voyager-Lite) integrates 21 E1 LIUs and framers along with SONET/SDH framer and VT/VC mappers. It includes all necessary SONET/SDH framing functionality and can be used as chipset with XRT91L30 transceiver, providing SONET/SDH-compliant serial interface at 155 Mbps that can directly connect to optical module. Optimized for tributary aggregation applications, product offers asynchronous and bit-retimed modes.
Original Press Release:
Exar Releases Industry's First Integrated 21-channel E1 LIU/Framer with VT/TU Mapper
Device is Ideal for Cost-Sensitive Transport Applications Including Multiservice Provisioning Platforms and Routers
Fremont, California, September 25, 2006 - Exar Corporation (Nasdaq: EXAR), a leading provider of high-performance, mixed-signal silicon solutions for the worldwide communications infrastructure added to its already extensive portfolio of solutions for connecting to the metro core and metro access networks the industry's first integrated 21-channel E1 LIU/framer with VT/TU Mapper/DeMapper. The XRT86SH221 (Voyager-Lite) is optimized for the tributary aggregation applications such as multi-service provisioning platforms, routers, optical and wireless transport.
"Responding to market requirements for a 21-channel E1 device for transport applications, Exar has leaped over the competition to offer this targeted solution," said Al Gharakhanian vice president of Marketing, Network and Transmission Products. "It is an ideal solution for the highest growth emerging markets where cost reduction has become a necessity."
The device provides significant board space savings due to an unprecedented level of LIU/Framer/Mapper integration. When three XRT86SH221s are combined on one line card, the device's unique innovative architecture delivers a complete OC-3/STM-1 solution that supports up to 63 E1 port aggregation. The XRT86SH221 includes all necessary SONET/SDH framing functionality to provide an OC-3/STM-1 compliant interface. Also, the XRT86SH221 can be used as a chipset with Exar's XRT91L30 transceiver providing a SONET/SDH compliant serial interface at 155 Mbits/sec that can directly connect to an optical module. In addition, the device utilizes Exar's proprietary R3 Technology(TM) (Reconfigurable, Relayless Redundancy) delivering key benefits to customers designing E1 interface cards.
"This highly integrated solution will enable our networking equipment customers to design systems ranging from high-density cross-connects to pizza-box type systems with enhanced capabilities," said John Demiray, senior director of strategic marketing, Networking and Transmission products. "Voyager-Lite now addresses the most cost sensitive applications where only E1 signals need to be transported."
Distinguishing Features
The device's high level of integration enables system designers to architect their systems in configurations that were not practical in the past. Instead of using separate LIU and framer modules, system designers now have the option of using a single module for both LIU and framer functionality, saving significant systems cost and board space.
Each LIU channel on the XRT86SH221 supports Exar's R3 Technology - introduced in 2002. Devices using R3 Technology are reconfigurable with integrated termination supporting all common T1/E1/J1 line impedances enabling customers to build a simple board and eliminate the need for external relays for 1:1 and 1+1 redundancy applications. This feature allows final device configuration to be made just prior to line-card installation. This unique capability prevents customers from having to unnecessarily stockpile an inventory of all configurations to accommodate changing market conditions.
The XRT86SH221 architecture supports SONET/SDH compliant E1 de-synchronizers in the drop direction in addition to the jitter attenuator functionality in the add direction. This architecture addresses different types of rigorous network jitter requirements, which in the past required very expensive multi-chip solutions.
Applications
When the XRT86SH221 is combined with Exar's other SONET devices into a multi-chip solution it delivers a wide range of design options for Add/Drop Multiplexer and E1 aggregation systems. In an Add/Drop Multiplexer application, as shown in the illustration exar.com/images/xrt86sh221_fig.gif., systems using the Exar devices can support a 4-chip solution for an 63 E1 aggregation with OC-3/STM-1 output.
Product Details
The device integrates 21 E1 LIU's and framers along with a SONET/SDH framer and VT/VC mappers. The device also incorporates a VT/VC cross-connect where the incoming E1's can be connected to any one of the VT/VC locations on the SONET/SDH path. Voyager-Lite also performs all the necessary framing, pointer processing and mapping functions required for mapping of 63xE1 spans to either VC-12/TU-12/TUG-2/VC-3/AU-3/STM-1 or VC-12/TU-12/TUG-2/TUG-3/VC-4/AU-4/STM-1. The device provides mapping of up to 21 E1 streams asynchronously into VT/STS-1 or TU/STM-1. In addition to the asynchronous mode, Voyager-Lite also provides a bit-retimed mode where the output of each E1 can be timed from a system clock to support synchronous applications. It also supports a standards compliant 2.048 Mbits/sec PCM30 CRC-4 E1 framer.
Prices, Packages, Availability and Additional Information
Samples of the part are available now. The XRT86SH221 in a 388 PBGA package operates at 3.3V/1.8V with 3.3V tolerant I/O's over the industrial temperature range. In 1,000 piece quantities the XRT86SH221 is $47.81. Additional information on this product can be found www.exar.com/product.php?ProdNumber=XRT86SH221 and other Exar T1/E1products at www.exar.com/area.php?areaID=2.
About Exar
Exar Corporation designs, develops and markets high-performance, analog and mixed-signal silicon solutions for a variety of markets including networking, serial communications, clock and timing, and storage. Leveraging its industry-proven analog design expertise and system-level knowledge, Exar delivers to customers a wide array of technology solutions for their current as well as next generation products. The Company is based in Fremont, CA, had fiscal 2006 revenues of $67.0 million, and employs approximately 250 people worldwide. For more information about the Company visit: www.exar.com.
