Re: HA without fallback-CBUS

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

>The problem is that for most people there isn't really a NEED for
backup systems ...

Only, with C-Bus being used commercially, with its various demands,
including risk-mitigation, I imagined failure strategies would have been
part of the game ...

Anyway, if I understand things correctly, C-Bus uses Cat5 or Cat5e for
its signal line, coloured pink for differentiation, but only for the
convenience & economy of using a readily available cable - it doesn't
really need the bandwidth, 'though that's handy because it allows some
flexibility in laying the cables.   OTOH, while with EIB running power
&
control cables together is said to be OK, with C-Bus considerable
separation is demanded - is that just them playing safe, or is C-Bus
more prone to emi (if the former, then installation costs will have been
driven up unnecessarily, 'though keeping them separate might still be a
good idea, to make future update re-runs easier).   I've also heard that
coax would be better than twisted-pairs, the separation & the
dielectric
being the thing and the twisting just a way of keeping the pairs
together - but using coax would be too expensive.   Am I right in all this
?

'still trying to get a handle on bandwidth necessities for signal lines
... at the moment, it seems cables are running ahead of the equipment
being connected, at least when it comes to Giga-Ethernet - but for how
long, I wonder - will the move to HD TV & DVD change the situation, at
least in multi-channel distribution situations ?

Chris

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Saturday, 14 Jan'06 - 19:58:08 -0000

from: "Phil Harris" <phil@xxxxxxx>

Surely the answer to this is that pretty much any system can be
installed with a failure backup / redundancy of whatever level the
customer wants AND IS WILLING TO PAY FOR.

The problem is that for most people there isn't really a NEED for backup
systems as the primary systems aren't generally mission critical (on the
whole it isn't going to cause death or injury around the home if the
lights go out) and so the cost of implementing those failover systems
usually ends up being spent on prettier switches or a big telly ...

Phil