yin@wesley.usc.edu (Ming Yin) (03/22/91)
Hi, Presently, I am involved in a project whose goal is to transport HIPPI frames using SONET payload. After reading numerous articles on SONET, I am still unclear on SONET standard. My questions are: 1) What is the algorithm used in scrambling STS-1 frames? 2) Given a STS-1 frames, by looking at the frame can one tell if the STS-1 payload contains one DS3 signals or several DS1 signals? Or does it matter? 3) HIPPI interface has two different data rate - 800 Mbit/s and 1,600 Mbit/s. This means that one should use STS-18 (933 Mb/s) and STS-36 (1866 Mb/s), respectively. From what I can gather, the number of columns allocated to overhead is 3N for STS-N. This means that there are 54 and 108 columns allocated to STS-18 and STS-36, respectively. This is correct? If it is, then it seem to alot of waste of having 54 or 108 columns (translates to overhead of 40.104 Mb/s and 80.208 Mb/s) allocated to overhead for a single source. Thanks in advance. Ming Yin yin@solar.usc.edu yin@desperado.etdesg.trw.com