[time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?
phk at phk.freebsd.dk
Sun Dec 20 04:03:46 EST 2015
In message <20151220042724.0F3D8406057 at ip-64-139-1-69.sjc.megapath.net>, Hal Murray writes:
>phk at phk.freebsd.dk said:
>> The main reason Ethernet went balanced was actually for fault isolation
>> (star-topology vs. bus) and signal quality (IT people were horrible at
>> "sharking" and crimping coax.)
>The reason Ethernet switched to a star topology was to take advantage of the
>wires that were already installed in most buildings.
That came later.
The first twisted-pair stuff only allowed 30m of wire and was meant for
connecting workstations in an office to a hub, so that only the hub
had to attach to the "backbone" coax.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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