Fiber cut in SF area
Peter Beckman
beckman at angryox.com
Mon Apr 13 18:18:54 UTC 2009
On Mon, 13 Apr 2009, Dylan Ebner wrote:
> It will be easier to get more divergence than secure all the manholes in
> the country.
I still think skipping the securing of manholes and access points in favor
of active monitoring with offsite access is a better solution. You can't
keep people out, especially since these manholes and tunnels are designed
FOR human access. But a better job can be done of monitoring and knowing
what is going on in the tunnels and access points from a remote location.
Cheap: light sensor + cell phone = knowing exactly when and where the
amount of light in the tunnel changes. Detects unauthorized
intrusions. Make sure to detect all visible and IR spectrum, should
someone very determined use night vision and IR lights to disable the
sensor.
Mid-Range: Webcam + cell phone = SEEING what is going on plus
everything above.
High-end: Webcam + cell phone + wifi or wimax backup both watching the
entrance and the tunnels.
James Bond: Lasers.
Active monitoring of each site makes sure each one is online.
Pros:
* Knowing immediately that there is a change in environment in your
tunnels.
* Knowing who or at least THAT something is in there
* Being able to proactively mitigate attempts
* Availability of Arduino, SIM card adapters, and sophisticated sensor
and camera equipment at low cost
Cons:
* Cell provider outage or spectrum blocker removes live notifications
* False positives are problematic and can lower monitoring thresholds
* Initial expense of deployment of monitoring systems
Farmers use tiny embedded devices on their farms to monitor moisture,
rain, etc. in multiple locations to customize irrigation and to help avoid
loss of crops. These devices communicate with themselves, eventually
getting back to a main listening post which relays the information to the
farmer's computers.
Tiny, embedded, networked devices that monitor the environment in the
tunnels that run our fiber to help avoid loss of critical communications
services seems to be a good idea. Cheap, disposable devices that can
communicate with each other as well as back to some HQ is a way to at
least know about problems of access before they happen. No keys to lose,
no technology keeping people out and causing repair problems.
Some other things that could detect access problems:
* Pressure sensors (maybe an open manhole causes a detectable change in
air pressure in the tunnel)
* Temperature sensors (placed near access points, detects welding and
thermite use)
* Audio monitor (can help determine if an alert is just a rat squealing
or people talking -- could even be automated to detect certain types of
noises)
* IR (heat) motion detection, as long as giant rats/rodents aren't a problem
* Humidity sensors (sell the data to weatherbug!)
One last thought inspired by the guy who posted about pouring quick-set
concrete in to slow repair. Get some heavy-duty bags, about 10 feet long
and large enough to fill the space in the tunnel. More heavily secure the
fiber runs directly around the access space, then inflate two bags on
either side of the access point. Easily deflated, these devices also have
an electronic device which can notify HQ that they are being deflated or
the pressure inside is changing (indicating pushing or manipulation).
That way you only need to put these bags at access points, not throughout
the whole tunnel.
Kinda low-tech, but could be effective. No keys needed, could be
inflated/deflated quickly, and you still get notification back to a
monitoring point.
Beckman
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Peter Beckman Internet Guy
beckman at angryox.com http://www.angryox.com/
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