[time-nuts] WWV and legal issues

Brian Lloyd brian at lloyd.aero
Thu Aug 30 08:45:15 EDT 2018


On Thu, Aug 30, 2018 at 7:01 AM, Scott McGrath <scmcgrath at 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
brian at lloyd.aero
+1.210.802-8FLY (1.210.802-8359)


More information about the time-nuts mailing list