Communications: Transmux And Mapping Chip Trims Cost Per Port For Voice/Data Service

May 26, 2005

The PM8318 (TEMAP 168) stakes its claim as the industry's highest-density, trans-multiplexing (transmux), PDH mapper solution. Trans-multiplexing provides the interworking between legacy and next-generation networks by bridging T1/E1 traffic mapped into legacy DS-3s to T1/E1 traffic mapped into standard Sonet/SDH containers. The TEMAP 168 supports clear-channel DS-3 and DS-3 transmux mapping on one, reducing equipment-supplier development costs. The device integrates 168/126 T1/E1 bidirectional PMON-capable transceivers, six DS3/E3 bidirectional PMON-capable transceivers, and six M13 multiplexers. To eliminate interface density constraints, the TEMAP 168 employs the Scalable Bandwidth Interconnect Transport (SBI TR) bus, an extension of the industry-standard SBI(TM) bus. Housed in a 23- by 23-mm FCBGA, the PM8318 sells for $385 apiece in 1000-unit lots.

PMC-Sierra Inc.www.pmc-sierra.com

About the Author

Dave Bursky

Technologist

Dave Bursky, the founder of New Ideas in Communications, a publication website featuring the blog column Chipnastics – the Art and Science of Chip Design. He is also president of PRN Engineering, a technical writing and market consulting company. Prior to these organizations, he spent about a dozen years as a contributing editor to Chip Design magazine. Concurrent with Chip Design, he was also the technical editorial manager at Maxim Integrated Products, and prior to Maxim, Dave spent over 35 years working as an engineer for the U.S. Army Electronics Command and an editor with Electronic Design Magazine.