Article View: sci.electronics
Article #19235Re: N.B.S. Time Service
From: Glenn Scott
Date: Tue, 07 Jun 1988 23:18
Date: Tue, 07 Jun 1988 23:18
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In article <3335@phri.UUCP>, roy@phri.UUCP (Roy Smith) writes:
>glenn@otto.UUCP (Glenn Scott) writes:
> In addition, the "speed of light delay" via satellite shouldn't be much
> different than the speed of light delay over a copper wire...
> If I call Colorado from New York and get a land line, I'm going over
>maybe 3-4000 miles of path (doesn't make much difference if it's copper
>wire, microwave, or fiber; in reality it's probably a combination of all
>three).
Ah, well, then I don't think we're really talking about "land-lines" then.
Ten years ago, during college, I worked for "The Phone Company" as a
switchman. Way back then "land-line" meant metal. Specifically, no
multiplexing (no microwave, no fiber, no satellite).
But in any case, the receiver doesn't determine the routing. If an
ordinary consumer makes a call it is routed via the most viable route.
Glenn
PS: There is a difference between copper wire, and microwave or fiber.
Microwave and fiber are multiplexed and thus have some scheduling
delays, albeit small.
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arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ames!ll-xn!oberon!sdcrdcf!otto!glennReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ames!ll-xn!oberon!sdcrdcf!otto!glenn From: glenn@otto.lvsun.com (Glenn Scott) Newsgroups: sci.electronics,sci.astro,comp.dcom.modems,comp.misc,rec.ham-radio Subject: Re: N.B.S. Time Service Keywords: Time Ticks Message-ID: <588@otto.lvsun.com> Date: 7 Jun 88 23:18:15 GMT References: <455@trane.UUCP> <4691@watcgl.waterloo.edu> <585@otto.COM> <3335@phri.UUCP> Reply-To: glenn@otto.lvsun.com (Glenn Scott) Organization: Las Vegas Sun Lines: 24