[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)

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