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Re: Alabama/Florida observations

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  • hal
    Sorry about that. Should not have gone to the list. Please ignore it. Thanks
    Message 1 of 11 , May 6, 1999
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      Sorry about that. Should not have gone to the list. Please ignore it. Thanks

      hal wrote:

      > From: hal <halfei@...>
      >
      > Gosh Albert, we seem to have worked in the same place. I "worked" at the
      > Foreign Affairs Data Processing Center at State around the
      > same time. Its where I gained my immense respect for the State. BTW lets see if
      > we can plan a joint trip to Spear Mt.
      >
      > Hal
      >
      > Albert Lawrence wrote:
      >
      > > From: Albert LaFrance <ALaFrance@...>
      > >
      > > I worked during the summer of 1978 in data processing at the State
      > > Department, and recall being told that cables for classified un-encrypted
      > > ("red") circuits within the building were carried in red-painted steel
      > > conduits, with the fittings welded and the pipe pressurized to detect
      > > intrusion. As I understood the concept, the crypto equipment was
      > > centralized in one or more secure technical-control rooms, with the lines
      > > between these rooms and the end users' phones and data terminals being
      > > protected solely by the conduits.
      > >
      > > I think pressurization for moisture protection was also used with aerial
      > > phone cables, at least the paper-insulated lead-covered cables which were
      > > presumably less tolerant of water than are plastic-insulated cables. In
      > > the 60s and 70s, it was quite common to see a tall gas cylinder (probably
      > > nitrogen) chained to the base of a telephone pole, with a hose going up the
      > > pole and attached to the cable. These setups seemed to come and go;
      > > perhaps the pressurization was only used when circuit problems suggested a
      > > leak. I also recall seeing technicians using listening devices on long
      > > poles to "sniff" for leaks along aerial cable runs.
      > >
      > > More recently, I've noticed a few old lead aerial splice cases having a
      > > small box attached to the case by a short stem. There is a small cable
      > > coming out of the box and connecting to a nearby junction box, like a
      > > regular subscriber line. I'm wondering if these boxes are pressure
      > > sensors.
      > >
      > > ...Albert
      > >
      > > >A couple ex-telco types told me there were/are situations where dedicated
      > > >copper cables were used for national defense communications. These cables
      > > >always had the splice casings painted a bright red. The local technicians
      > > >were forbidden to open one of those splice closures, under penalty of
      > > >termination of employment and federal prosecution!
      > > >
      > > >Seems there was a way that the integrity of the seals on the cables could
      > > >be determined from remote sites.
      > > >
      > > >Many cables were pressurized to keep water/moisture out, so perhaps loss
      > > of
      > > >pressure was used to alert in case of a breach.
      > >
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