Why Exar?
EXAR has highly integrated multi-channel SONET/SDH framer products with on chip high speed multi-channel SERDES functions, a range SONET/SDH CDR and Transceiver products. The higher levels of integration and superior jitter performance has benefited many successful SONET/SDH product deployments.
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Higher Levels of Integration and Functionality
At the high end, the highest density devices contain 16xOC-48/STM16 or 4xOC192/STM64 framers with 768 Pointer Processors plus 32x2.5G high performance analog SERDES with CDR functions that drive SFPs and meet all SONET/SDH jitter performance requirements. These devices are well suited for the high density (4x10G) or 16x2.5G line card solutions required for next generation SONET/SDH networks.
Superior Jitter Performance
The standalone CDR and Transceiver (SERDES with CDR) products exceed the stringent SONET/SDH Jitter Generation specs for the transmitter (driving SFPs directly).
The receivers have a lot of margin for Jitter Tolerance and also meet Jitter transfer specs for certain regenerator applications where it is required.
Software Support
Exar provides a full set of device driver software for all of its SONET/ SDH products via a concise set of API (Application Programming Interface) calls to configure, and manage the channels with or without interrupt handling. Exar's device driver software for SONET/SDH products are fully tested and are operating system and processor independent.
Applications of SONET/SDH products
Exar's world-class physical layer solutions are ideal for a wide variety of markets and applications:
- Line cards
- Access Concentrators
- Multi-Service Provisioning Platforms (MSPP)
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Exar's SONET Transceivers and CDRs have been used in SONET/SDH and backplane applications that require 155Mbps or 622Mpbs rate, because of their excellent Jitter Genration/ Tolerance/ Transfer performances and ease of use. Quad channel CDRs are also available.
Exar’s Ethernet over SONET (EoS) Mappers have industry leading power and functionality. Supporting OC-3/STM1, OC-12/STM4, OC-48/STM16 and OC-192/STM64, our product breadth and depth is unmatched. Our EoS mapper products products feature full support for GFP/VCAT/LCAS as well as optimized solutions for transporting GigE (GE) over WDM/DWDM networks.
Another family of Framer / Mapper products provide flexible mapping of multi-channel T1/E1 or DS3/E3 clients into SONET/SDH networks. The highest density product in this family provides mapping of 28 independent T1s (or 21 E1s) into an STS-1. It also supports the transparent transfer and regeneration of the independent T1/E1 clocks across the SONET/SDH network and meets all the jitter / wanders specs of the T1/E1 client interfaces.
The Tethys family of products offers the highest density mixed signal devices and contain 16xOC-48/STM16 or 4xOC192/STM64 framers with 768 Pointer Processors plus 32x2.5G high performance analog SERDES with CDR functions that drive SFPs and meet all SONET/SDH jitter performance requirements.
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These devices are well suited for the high density (4x10G) or 16x2.5G line card solutions required for next generation SONET/SDH networks. For multi-rate Access products, the devices offer upto 16x 2.6G/16x 622M/16x155Mbps.These devices are pin and software compatible, enabling rapid development of common cards for multiple application scenarios
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