Article View: sci.electronics
Article #4180Cable converters
From: Hagbard Celine
Date: Wed, 17 Jan 1990 15:42
Date: Wed, 17 Jan 1990 15:42
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1841 bytes
A friend worked for a cable company over the summer and "procured" a "lost"
unit or two. (Shh!) They were of the new Jerrold series, though I have
forgotten exact models, et cetera.
Anyway, he gave them to me for inspection. They had a metal plate on the
back that, when removed, revealed a connector of some sort. I opened the whole
box (quite a trick, actually) and found that a small-ish (27128?) EEPROM seemed
to be rather directly connected to this interface. I never bothered to track
down pinouts to test the theory, but from this I guessed that the EEPROM could
be programmed / read from the interface, and actually stored a converter ID
number or similar. The system they were used on DOES send information signals
down the line, and an upgrade in service requires only a 15 second wait or so
while the operator types the authorization in, et cetera.
We cooked up this extensive plan to borrow a EEPROM programmer, take the
EEPROM from a box that was paying for all service, and make lots of copies of
it for ourselves and our friends. We WERE aware of the illegality of such a
thing..no flames, please.
So, would it have worked?? Are my assumptions on the EEPROM correct? Am
I more confused than I, myself realize??
Andrew
--
Andrew Reynhout (Internet: reynhout@wpi.wpi.edu)
(BITNET: reynhout@wpi.bitnet)
All hail Eris!
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!husc6!m2c!wpi!reynhoutReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!husc6!m2c!wpi!reynhout From: reynhout@wpi.wpi.edu (Hagbard Celine) Newsgroups: sci.electronics Subject: Cable converters Message-ID: <6862@wpi.wpi.edu> Date: 17 Jan 90 15:42:57 GMT References: <6861@wpi.wpi.edu> Reply-To: reynhout@wpi.wpi.edu (Hagbard Celine) Organization: Worcester Polytechnic Institute, Worcester ,MA Lines: 28