In-Service T1/E1 Performance Monitoring

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Abstract
T1 and E1 access networks form a strategically important part of a carrier's service offering. Their already large installed base continues to grow as more and more business customers adopt T1 and E1 for broadband connectivity. Efficient supervision and maintenance of these networks is essential for carriers. In particular, continuous in-service monitoring has become critical as more and more T1 and E1 connections are provided to customers based upon contractual quality of service guarantees in the form of Service Level Agreements (SLA).
This paper describes how carriers currently implement in-service performance monitoring and fault localization on existing T1/E1 circuits using dedicated overlay networks. It identifies how integration of this functionality into the next generations of transport equipment provides increased operational efficiencies that translate to cost savings for carriers. It describes the standardized mechanisms used to support enhanced in-service performance monitoring for T1 and E1 paths and how these will be implemented in the next generations of T1/E1 framing devices.

About PMC
PMC-Sierra™ is a leading provider of high speed broadband communications and storage semiconductors and MIPS-Powered™ processors for Enterprise, Access, Metro Optical Transport, Storage Area Networking and Wireless network equipment. The company offers worldwide technical and sales support, including a network of offices throughout North America, Europe and Asia. The company is publicly traded on the NASDAQ Stock Market under the PMCS symbol and is included in the S&P 500 Index.

About the Author
Gerry Leavey is a Technical Advisor in the Product Research Group of PMC-Sierra and oversees ICs for wireline and wireless access systems.

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