North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: MCI [ATM overhead]
At 08:38 AM 3/20/96 -0800, Wolfgang Henke wrote: > >Thank you for the reference. I will certainly check it out. Here is a >little table which I hope will help ISPs planning to upgrade bandwidth: > > >SONET (Synchronous Optical Network) speeds given in Mbps > > nominal w/o Sonet ATM TCP/IP > overhead > >OC-3 STS-3c 155.520 149 122 137 future net backbone > >OC-12 STS-12c 622.080 599 488 549 > >OC-48 STS-48c 2488.32 2396 1953 2197 current telco backbone > >OC-192 STS-192c 9953.28 9585 7813 8788 > >on single mode fiber >or multi mode fiber >or CATV 75 ohm coax (the lower speeds) > And here's one that [fills in the gaps] shows the relationship between STS and SDH: SONET/SDH Heirarchies SONET Bit Rate SDH STS-1/OC-1 51.84 Mb - STS-3/OC-3 155.52 Mb STM-1 STS-12/OC-12 622.08 Mb STM-4 STS-24/OC-24 1244.15 Mb - STS-48/OC-48 2488.32 Mb STM-16 STS-192/OC-192 9953.28 Mb STM-64 - paul
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