Re: Coax as data cable

[G. Morgan <alarmpro@xxxxxxxxxxx>]

On Wed, 27 Dec 2006 20:40:50 -0500, "Robert L Bass" <sales @ comcast +
net> wrote:


1.
>Numerous professional installations still emoploy screw-on BNC connectors
>for CCTV.  They work fine for composite video only but they're not good
>enough for hi-def and some up-the-coax data applications.

2.
>As mentioned above, up-the-coax PTZ control data is an option.

3.
>If it's a lengthy cable run your customer might be happier if you first
>consider sending the PTZ via that extra coax.  It works well when properly
>set up and it can be a time saver for you.

BWAHAHAHAHAHA!!!!!!!

Wow...  You never have even *SEEN* a CCTV system apparently.  Screw-on
BNC's huh?  LOL....


The only viable data over coax I've seen is Pelco's 'Coaxatron' <sp>
protocol which requires Pelco products on each end.   I suppose one
could also use third party modems on each side to transmit rs485 data,
but that would be cost prohibitive compared to just running a Cat5
with the coax -- even then only one cable is needed for data and
video, so I don't know what the heck that second coax is for.


I hope the 2 hour phone course CCTV 101 is not offered in your
distance learning catalog.

--

-Graham

(delete the double e's to email)