Digital Lightwave announced the simultaneous and independent testing of multiple tributaries within a SONET stream as an additional feature to the NIC Plus Embedded-Platform. This enables a user to test various combinations of STS-12, STS-3, STS-1 and DS3 tributaries embedded within a single higher-speed SONET optical carrier (OC-3/12/48) stream. Each test is bidirectional (transmit and receive), simultaneous and independent. http://www.lightwave.com
Digital Lightwave Expands its SONET Test Capabilities
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From the Technology Graveyard
You just read about SONET. Here is what it replaced:
PDH (T1/E1/DS3) served from 1962. What ultimately replaced it?
PDH (T1/E1/DS3) time-division multiplexing that interleaved 24 (T1) or 30 (E1) 64 kbit/s voice channels into a frame, then stacked those into higher rates by bit-stuffing loosely synchronized streams. Its job passed to SONET — but the problem it solved, and the ideas it proved, live on in what replaced it. The standard rests here in the archive. One of 198 technologies here that opened a door and then held it for the next.
On this day
June 2From 25 years of the Converge Digest archive.