Hi This is not so much a GPS issue as a system design issue. GPSDO’s are used to “smooth over” bumps in a lot of systems out there. At the timing levels required by ATM or authentication setups, you can go a *long* time running on a GPSDO. It’s not a matter of GPS, it’s a matter of doing things on the cheap ….
Bob > On Aug 30, 2018, at 10:42 AM, Scott McGrath <scmcgr...@gmail.com> wrote: > > Um no > > Will the internet continue to route packets without precision timing yes it > will, Yes the lambdas will stay lit on fiber but the ATM transport that runs > on the lambdas will fail (note DSL is simply an ATM VC over copper). and > other timing dependent services will fail > > Will many services like authentication continue especially those based on > multimaster replication continue to function? > > No they will not, they are totally dependent on precision timing to ensure > proper replication sourcing. (Microsoft Active Directory) > > Banking transactions in the same boat. > > Unless you’ve actually run a large network you dont realize just how > dependent on precision timing the services running over the network have > become especially authentication And one reason for this is increased > security for the overall network. > > On Aug 30, 2018, at 8:45 AM, Brian Lloyd <br...@lloyd.aero> wrote: > > On Thu, Aug 30, 2018 at 7:01 AM, Scott McGrath <scmcgr...@gmail.com> wrote: > >> >> >> >> Without precision timing there is no telephone network, cell phones or >> internet. And that only became true in the last 20 years or so as long >> haul networks went from FDM on coaxial cable to TDM on fibre. >> > > The Internet is largely asynchronous due to the store-and-forward nature of > the routers. Fiber capacity is increased through the use of wavelength > division multiplexing (WDM) which is itself a form of FDM. The Internet > functions without any sort of central synchronization. > > Yes, there are portions that run over the synchronized telco services but > that is by convenience, not necessity. > > -- > > > > Brian Lloyd > 706 Flightline > Spring Branch, TX 78070 > br...@lloyd.aero > +1.210.802-8FLY (1.210.802-8359) > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
