North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: SONET ring questions
> For total system uptime > 90.0% (one nine or less) Desktop systems. > 99.0% (two nines) Intermediate business systems > 99.9% (three nines) Most business data systems and workgroup servers > 99.99% (four nines) High-end business systems and your friendly > neighborhood telco > 99.999% (five nines) Bank Data Centers and Telco Data Centers, some ISPs > 99.9999% (six nines) Only God and Norad live here. > 99.99999% (seven nines) Even God doesn't have pockets this deep. What's your source for this data? -a
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