Hi Most telecom systems are still a "timing monoculture". All of their sources of time are duplicates of the same thing. There are multiple categories of trouble that will affect all of their sources. Redundancy with multiple types of timing is what would make a more robust system. That's the stuff you rarely if ever see.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Magnus Danielson Sent: Tuesday, November 23, 2010 8:05 AM To: [email protected] Subject: Re: [time-nuts] GPS jamming susceptibility On 23/11/10 13:36, Bob Camp wrote: > Hi > > If you are going to depend on any form of over the air timing, you need holdover. It's not a "option" its a requirement. There are simply to many things that can create issues with the signal you are using. That's true of any over the air system, not just GPS. Redundancy would also be nice, the people who design these systems don't seem to ever go that route. > > The nice part of that is - we get lots of Thunderbolts and Z380x's on the surplus market nice and cheap. Good stuff. It varies among the operators. Some have their telecom hat on, and then network redundancy is among the top things and they look at it carefully. Then again others treat it as an alien aspect and their only strategy is to make it as cheap and least annoying as possible. Ah well. There are many ways to loose sync, real life teaches us... Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
