Re: Alarm to connect to CBus (excluding Comfort)

[Kevin Hawkins <yahoogroupskh@xxxxxxxxxxxxxx>]

The security aspect of C-Bus has always intrigued me.  Is there some
device or application that can report losses of devices on a C-Bus
network and also prevent new devices being introduced ?   Maybe an
encrypted C-Bus or something ? Presumably an install like Wembley must
have had these issues resolved.

I always wondered if I checked into a C-Bus wired hotel with C-Bus
toolkit on my laptop what access I could get to their C-Bus network from
the lightswitch cabling...

K

K. C. Li wrote:
> On Mon, 2 Jun 2008, Mike Griffiths wrote:
>
>
>> The main difference is in the connection
>> With C-bus if you cut the cable the PIR stops working and possibly
the
>> whole C-bus network !
>>
>
> It depends on how the C-Bus system is wired. If it is wired radially,
as
> it is commonly the case, cutting the wire would only disable that
branch
> without affecting other branches.
>
>
>> With an alarm system if the cable gets cut the alarm goes off as
the
>> alarm system is still working
>>
>
> I am not advocating the use of a C-Bus system as a security system but
> there is nothing inherently designed or omitted in C-Bus to make it
> impossible to achieve. There are enough spare wires in the C-Bus cable
to
> allow for a simple temper circuit to be incorporated. eg. Connecting
the
> "temper circuit" of a closed loop to a L5504AUX Auxiliary
Input Unit to
> detect an open circuit and trigger something within C-Bus.
>
> Regards,
>
> Kwong Li
> li@xxxxxxx
> Laser Business Systems Ltd.
> http://www.laser.com
> http://www.cbus-shop.com
>
>
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