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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!lll-winken!telecom-request
- From: martin@bdsgate.com (Martin Harriss)
- Newsgroups: comp.dcom.telecom
- Subject: Re: It's Not a Bug, it's a Feature ...
- Message-ID: <telecom13.14.10@eecs.nwu.edu>
- Date: 7 Jan 93 14:50:23 GMT
- Sender: Telecom@eecs.nwu.edu
- Reply-To: bdsgate!martin@uunet.UU.NET (Martin Harriss)
- Organization: Beechwood Data Systems
- Lines: 23
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 13, Issue 14, Message 10 of 14
-
- In article <telecom13.7.11@eecs.nwu.edu> armhold@dimacs.rutgers.edu
- (George Armhold) writes:
-
- > At RU, I worked with Sun 4/110s. They were networked via thin-net
- > coax. I have pretty sensitive ears, and could always hear a
- > high-pitched whine when lots of data went through the wire (opening an
- > xterm, for example.) One thing that was neat about this is that
- > whenever someone logged in to the workstation I was working on I could
- > actually *hear* them log in. Nobody believed me of course. Whenever
- > I tried to show it to someone they thought I was nuts. :-)
-
- Ethernet tranceivers have a DC-DC converter on them that isolates the
- electronics that interface with the network and the electronics in
- your computer. Said DC-DC converter probably operates at 10-20kHz.
- When the tranceiver electronics sends or receives data, it may draw
- more current and in doing so change the frequency that the converter
- operates at. This may be the whine that you hear.
-
- So you're probably not nuts after all!
-
-
- Martin Harriss uunet!bdsgate!martin
-